Thursday, October 25, 2007
Appetizer Recipes
Mushroom & Sun Dried Tomato Spread
½ lb. fresh mushrooms
½ lb. portabella mushrooms
½ cup chopped sun dried tomatoes
¼ cup green onions, chopped
3 garlic cloves
2 loaves french bread, cut into diagonal slices
1 tbsp. olive oil
1. In food processor or blender puree all ingredients.
2. Toast bread in oven until lightly browned. Place bread on
serving dish or bowl.
3. Place mushroom mixture into bowl. Spread mixture into bread and
serve or have each person do their own.
½ lb. portabella mushrooms
½ cup chopped sun dried tomatoes
¼ cup green onions, chopped
3 garlic cloves
2 loaves french bread, cut into diagonal slices
1 tbsp. olive oil
1. In food processor or blender puree all ingredients.
2. Toast bread in oven until lightly browned. Place bread on
serving dish or bowl.
3. Place mushroom mixture into bowl. Spread mixture into bread and
serve or have each person do their own.
Friday, October 19, 2007
A Taste Of Vitality
+ Agave Nectar
This natural sweetener is extracted from the pineapple-shaped core of the blue agave (a cactus-like plant native to
Mexico best known for its use in making tequila). A 93% fruit sugar content allows agave nectar to absorb slowly
into the body, decreasing the highs and lows associated with sugar intake. Also, because fruit sugars are 25%
sweeter than sugar, you use less. It has a very neutral taste.
This natural sweetener is extracted from the pineapple-shaped core of the blue agave (a cactus-like plant native to
Mexico best known for its use in making tequila). A 93% fruit sugar content allows agave nectar to absorb slowly
into the body, decreasing the highs and lows associated with sugar intake. Also, because fruit sugars are 25%
sweeter than sugar, you use less. It has a very neutral taste.
A Taste of China
Egg−Drop Soup
1 1/2 quarts chicken broth or clear soup stock
2 tbls. cornstarch, mixed in 1/4 cup cold water
2 eggs, slightly beaten with a fork
2 scallions, chopped, including green ends
Bring soup stock to a bowl. Slowly pour in the corn starch mixture
while stirring the stock, until the stock thickens. Reduce heat
so stock just simmers. Pour in the eggs slowly while stirring
the soup. As soon as the last bit of egg is in, shut off heat at once
Serve with chopped scallions on top.
1 1/2 quarts chicken broth or clear soup stock
2 tbls. cornstarch, mixed in 1/4 cup cold water
2 eggs, slightly beaten with a fork
2 scallions, chopped, including green ends
Bring soup stock to a bowl. Slowly pour in the corn starch mixture
while stirring the stock, until the stock thickens. Reduce heat
so stock just simmers. Pour in the eggs slowly while stirring
the soup. As soon as the last bit of egg is in, shut off heat at once
Serve with chopped scallions on top.
30 Minutes Indian Recipes
Tina Chaudhuri
Tina Chaudhuri is an Indian woman doctor for whom writing has always been a passion, and she
started writing for local magazines and newspapers while studying at medical college in
Calcutta.
She became a regular contributor to international travel magazines after she finished her medical
education and residency.
She is also the Dermatology Guide for About.com and a columnist for Women's World- Stories,
besides having freelanced for several other leading publications.
Her other activities include being a part time volunteer for the Association for India's
Development, a non-profit, charitable organization.
Tina Chaudhuri is an Indian woman doctor for whom writing has always been a passion, and she
started writing for local magazines and newspapers while studying at medical college in
Calcutta.
She became a regular contributor to international travel magazines after she finished her medical
education and residency.
She is also the Dermatology Guide for About.com and a columnist for Women's World- Stories,
besides having freelanced for several other leading publications.
Her other activities include being a part time volunteer for the Association for India's
Development, a non-profit, charitable organization.
101 Recipes from God's Garden
Fresh Tomato Soup
1 large tomato
1 medium cucumber
1/2 red bell pepper
1 t Italian seasoning
1 t dill
1 t Bragg Liquid Aminos
1 t minced chives
1 t minced parsley
Place tomato in blender or Vita-Mix and blend at low speed until
creamy. Add remaining ingredients and mix well. Serve at room
1 large tomato
1 medium cucumber
1/2 red bell pepper
1 t Italian seasoning
1 t dill
1 t Bragg Liquid Aminos
1 t minced chives
1 t minced parsley
Place tomato in blender or Vita-Mix and blend at low speed until
creamy. Add remaining ingredients and mix well. Serve at room
temperature or cover and chill. Makes 1 to 2 servings.
Tuesday, October 16, 2007
Wireless Networks For Dummies 2004
Risks to the Network
A network is always at risk. Whether wired or wireless, there are many ways
that unauthorized access can occur. In your wired network, if you allow
casual physical access to your business premises, someone you do not know
can attach to your network and start stealing information. A simple example
is letting an unknown salesperson use an empty conference room without
supervision. Most businesses enable these rooms with network access, so it
is simply a matter of plugging into the wall socket and starting some hacking
A network is always at risk. Whether wired or wireless, there are many ways
that unauthorized access can occur. In your wired network, if you allow
casual physical access to your business premises, someone you do not know
can attach to your network and start stealing information. A simple example
is letting an unknown salesperson use an empty conference room without
supervision. Most businesses enable these rooms with network access, so it
is simply a matter of plugging into the wall socket and starting some hacking
Wireless Maximum Security 2006
Data AnalysisWhen data is transferred via the airwaves, it can be easily captured using programs downloaded from the Internet. This type of monitoring was expected, and is why WEP security was added to the 802.11 standard. Through the use of WEP, all data can be scrambled to the point where it becomes unreadable. Although WEP will not stop the wanton interception of data, it can stop the casual interpretation of the captured data. |
Wireless Java Developing With J2ME, 2nd Ed 2003
Overview
MIDP applications are built to run on many different devices without modification. This is particularly difficult in the area of the user interface because devices have screens of all sizes, in grayscale and in color. Furthermore, devices vary widely in their input capabilities, from numeric keypads to alphabetic keyboards, soft keys, and even touch screens. The minimum screen size mandated by MIDP is 96 × 54 pixels, with at least one bit of color depth. [1] As for input, MIDP is fairly openended: devices are expected to have some type of keyboard, or a touch screen, or possibly both.
Given the wide variety of devices that are compliant with MIDP, there are two ways to create applications that work well on all devices:
Wireless IP and Building the Mobile Internet 2003
3G NETWORKS AND STANDARDS
contrast, the latter is confined to cellular radio and mobility-enhanced bearers,
although opening the stage for a variety of IP-based applications.
The circuit domain of UMTS R3 builds on the master/slave paradigm
[11] of legacy GSM, inherited from the PSTN/ISDN, with the MSC acting
as master and the mobile terminal acting as slave. The transport plane that
physically transports voice is separated from Signaling System #7 (SS7)-based
call control or signaling plane that transports signaling messages and ensures
advanced features to voice calls.
contrast, the latter is confined to cellular radio and mobility-enhanced bearers,
although opening the stage for a variety of IP-based applications.
The circuit domain of UMTS R3 builds on the master/slave paradigm
[11] of legacy GSM, inherited from the PSTN/ISDN, with the MSC acting
as master and the mobile terminal acting as slave. The transport plane that
physically transports voice is separated from Signaling System #7 (SS7)-based
call control or signaling plane that transports signaling messages and ensures
advanced features to voice calls.
Monday, October 15, 2007
Wireless Hacks - 100 Industrial-Strength Tips & Tools 2003
Many people continue to use 802.11b, the protocol of the Wi-Fi revolution.
Throughout this book, I mainly discuss 802.11b (also known as Wi-Fi, but then, so is 802.11a). It is the de facto wireless networking standard of the last few years, and for good reason. It offers excellent range and respectable throughput. (While the radio can send frames at up to 11 Mbps, protocol overhead puts the data rate at 5 to 6 Mbps, which is about on par with 10baseT-wired Ethernet.) It operates using DSSS at 2.4 GHz, and automatically selects the best data rate (either 1, 2, 5.5 or 11 Mbps), depending on available signal strength. Its greatest advantage at this point is its ubiquity: millions of 802.11b devices have shipped, and the cost of client and access point gear is not only phenomenally low, but also ships embedded in many laptop and handheld devices. Since it can move data at rates much faster than the average Internet connection, it is widely regarded as "good enough" for general use.
Wireless Hacking Projects for Wi-Fi Enthusiasts 2004
Working with Client Devices
In our earliest SoCalFreeNet deployments, we would help residents get online using any device available.
Typically, this meant PCMCIA cards, USB client devices, or whatever the resident wanted us to
install on their computer.The problem with this method was that the moment we touched a resident’s
computer, we seemed to “own” that device. Inevitably, a problem would arise and even if that
problem had nothing to do with wireless, we would always get phone calls and e-mails asking for
help. From an end-user perspective, I can understand why this happens. One day a bunch of wireless
geeks come over to your house and install something new.The next day your printer stops working,
so naturally it must have been something caused by the new wireless card.
It would be great if we had the ability to service all the non-wireless technical support issues in
the neighborhoods we operate in. Unfortunately, given our limited time and resources, we found it
necessary to restrict our support services to maintaining the wireless infrastructure and leaving the
end-user technical support issues to third-party companies or relying upon “neighbor helping
neighbor” methods.
Typically, this meant PCMCIA cards, USB client devices, or whatever the resident wanted us to
install on their computer.The problem with this method was that the moment we touched a resident’s
computer, we seemed to “own” that device. Inevitably, a problem would arise and even if that
problem had nothing to do with wireless, we would always get phone calls and e-mails asking for
help. From an end-user perspective, I can understand why this happens. One day a bunch of wireless
geeks come over to your house and install something new.The next day your printer stops working,
so naturally it must have been something caused by the new wireless card.
It would be great if we had the ability to service all the non-wireless technical support issues in
the neighborhoods we operate in. Unfortunately, given our limited time and resources, we found it
necessary to restrict our support services to maintaining the wireless infrastructure and leaving the
end-user technical support issues to third-party companies or relying upon “neighbor helping
neighbor” methods.
Wireless Communication Technologies New Multimedia Systems 2002
EXAMPLES
This section presents three different analytical examples of directional propagation
channels that provide insight into the shape factor definitions and how
they describe fading rates. Each example is accompanied by a graph of the
angular spread and angular constriction and a graph showing the average and
limiting cases of fading rate variance with respect to omnidirectional propagation.
channels that provide insight into the shape factor definitions and how
they describe fading rates. Each example is accompanied by a graph of the
angular spread and angular constriction and a graph showing the average and
limiting cases of fading rate variance with respect to omnidirectional propagation.
Friday, October 12, 2007
Wi-Fi Toys - 15 Cool Wireless Projects For Home, Office, And Entertainment 2004
Introduction
Internet without wires. Think about that for a minute. All of the entertainment, utility, and
performance of the Internet yours, without being tied to a desk.Without even being tied to
the home or office. Internet without wires...anywhere! Wireless is a growing revolution
changing the way people communicate and share ideas. From cell phones to PDAs to mobile
computers, wireless access puts you instantly in touch with millions of other people around
the planet.Wi-Fi, in particular, is changing how people access the Internet from laptops and
PDAs. It’s emerging as an alternative for cellular service, and it may even replace regular
telephone lines as voice conversations begin to be re-routed over Wi-Fi networks in larger
numbers.
Internet without wires. Think about that for a minute. All of the entertainment, utility, and
performance of the Internet yours, without being tied to a desk.Without even being tied to
the home or office. Internet without wires...anywhere! Wireless is a growing revolution
changing the way people communicate and share ideas. From cell phones to PDAs to mobile
computers, wireless access puts you instantly in touch with millions of other people around
the planet.Wi-Fi, in particular, is changing how people access the Internet from laptops and
PDAs. It’s emerging as an alternative for cellular service, and it may even replace regular
telephone lines as voice conversations begin to be re-routed over Wi-Fi networks in larger
numbers.
WarDriving - Drive, Detect, Defend - A Guide To Wireless Security 2004
Chapter 7: Mapping WarDrives Using StumbVerter
Introduction
You have gone for a WarDrive. You now have a set of logged access points with their coordinates and other relevant data, and you think, “How am I going to make some use of this? How will I be able to see patterns in the geographical distribution of access points?” Mapping your data sets may be the answer.
There are several ways to map data. StumbVerter is a tool that’s designed to take advantage of the automation capabilities of Microsoft MapPoint. MapPoint is commercially available mapping software that covers North America and Europe. StumbVerter processes data captured with NetStumbler and generates maps that you can easily view and manipulate. You can also access online mapping engines that create maps for you free of charge. In this chapter we discuss the process of installing, configuring, and using StumbVerter to map your WarDriving results as well as using the Delphi Geographic Logging Engine (DiGLE). By the end of the chapter, you will know how to create colorful and informative access point distribution maps.
The Secrets of Wireless Hacking 2004
Chapter 3. Putting the Gear Together: 802.11 Hardware
When reading other books somewhat related to wireless penetration testing or just simple wardriving, the suggested hardware choice is both limited and amusing. It creates the impression that only this particular laptop brand together with that specific PCMCIA card type are useful for these aims. In reality, much depends on the hardware chosen, but there are precise technical reasons for such selection that are never listed in these sources. These reasons include client card sensitivity in dBm, client card chipset, the presence of connector sockets for an external antenna, client card power emission and consumption level, laptop/PDA battery power life and compatibility with UNIX-like operational systems, and so forth. That said, practically any wireless client card and PCMCIA/CF/SD slot-containing mobile computer can be used for wireless hacking with some additional tweaking and different grades of efficiency. This is the main message of this chapter.
Real 802.11 Security - Wi-Fi Protected Access And 802.11i 2003
Programming Wireless Devices With The Java 2 Platform Micro ed 2nd ed 2003
Chapter 5. CLDC Libraries
Java 2 Platform, Standard Edition (J2SE) and Java 2 Platform, Enterprise Edition (J2EE) provide a very rich set of Java class libraries for the development of enterprise applications for desktop computers and servers. Unfortunately, these libraries require tens of megabytes of memory to run and are therefore unsuitable for small devices with limited resources. In this chapter we introduce the class libraries supported by the Connected, Limited Device Configuration.
Learning Wireless Java 2001
4.1 The Application Manager
The application manager, sometimes called the Application Management System (AMS) or
MIDlet management software, is software that is preinstalled on a MIDP device and that functions
as an operating environment. For example, on a Motorola i85s, the Java Apps menu item will start
the application manager, which immediately shows the Java logo and the words "Mobile
Information Device Profile Compatible" and then displays a menu of the MIDlet suites that have
been installed on the phone.
MIDlet management software, is software that is preinstalled on a MIDP device and that functions
as an operating environment. For example, on a Motorola i85s, the Java Apps menu item will start
the application manager, which immediately shows the Java logo and the words "Mobile
Information Device Profile Compatible" and then displays a menu of the MIDlet suites that have
been installed on the phone.
IP In Wireless Networks 2003
Traffic Channel Data Services
The basic idea in providing TCH data service is to provide a CS conduit for carrying data from the user through the GSM PLMN and vice versa. The conduits are composed of CS bearers in the network and the TCH over the air interface.
The data path establishment procedure is very similar to the voice path establishment. There is also an IWF with the MSC, which serves as a gateway between data signals in the GSM PLMN and other networks, such as PSTN (public switched telephone network) and PSPDN (public switched packet data network). With a TCH-Full rate (TCH/F), the maximum effective data rate possible is 9.6 Kbps. With a TCH-Half rate (TCH/H), the maximum data rate is 4.8 Kbps. The GSM PLMN also provides high-speed circuit switched data (HSCSD), which combines multiple TCH/Fs and can provide a maximum data rate of 56 Kbps.
Deploying Secure 802.11 Wireless Networks with Microsoft Windows 2004
Wireless AP Troubleshooting Tools
Although the set of troubleshooting tools for wireless APs varies with each manufacturer and with each model, some of the more common troubleshooting tools are the following:
-
Panel indicators
-
Site survey software
-
SNMP support
-
Diagnostics
These tools are described in the following sections. Consult your wireless AP documentation for information about the set of troubleshooting tools provided with your wireless AP.
Wednesday, October 10, 2007
Caution! Wireless Networking Preventing a Data Disaster 2004
Separating Hackers from Crackers
The term hacker was originally used to describe a person who was technically proficient with whatever systems he or she hacked and could write exceptional computer code. Some of the original hackers were members of the Massachusetts Institute of Technology (MIT) Tech Model Railroading Club (TMRC). In fact, the term hacker has been around longer than the personal computer or the Internet, for that matter.
At MIT, students traditionally use the word hack to describe the elaborate and often amazing pranks that they play on each other and the faculty. In their world, a hacker is someone who creates something ingenious and truly original.
Bulletproof Wireless Security - GSM, UMTS, 802.11, And Ad Hoc Security 2005
1.4 Block Ciphers
Cryptographic algorithms are broadly divided into two categories depending on the
type of data they expect as input. Block ciphers take blocks (usually 64 bits) of data
as an input, whereas stream ciphers operate on a bit (or a byte) at time. Given a key, a
block cipher always encrypts a given block of plaintext to the same ciphertext. On the
other hand, given a key, a stream cipher will encrypt a given bit (or byte) of plaintext
to a different ciphertext.
The building blocks of block ciphers are permutation and substitution. Let’s say we
are dealing with k-bit blocks; a substitution specifies, for each of the 2k possible values
of the input block, the k-bit output. So, basically we have a substitution table. Since
it is impractical to manage such tables for 64-bit blocks, substitution is done for 8-bit
blocks which are obtained by splitting up the input block. To specify a completely randomly
chosen substitution for k-bit blocks would take about k.2k bits. A permutation
specifies, for each of the k input bits, the output position to which it goes. To specify a
completely randomly chosen permutation of the k-bits would take about k. log k.
Cryptographic algorithms are broadly divided into two categories depending on the
type of data they expect as input. Block ciphers take blocks (usually 64 bits) of data
as an input, whereas stream ciphers operate on a bit (or a byte) at time. Given a key, a
block cipher always encrypts a given block of plaintext to the same ciphertext. On the
other hand, given a key, a stream cipher will encrypt a given bit (or byte) of plaintext
to a different ciphertext.
The building blocks of block ciphers are permutation and substitution. Let’s say we
are dealing with k-bit blocks; a substitution specifies, for each of the 2k possible values
of the input block, the k-bit output. So, basically we have a substitution table. Since
it is impractical to manage such tables for 64-bit blocks, substitution is done for 8-bit
blocks which are obtained by splitting up the input block. To specify a completely randomly
chosen substitution for k-bit blocks would take about k.2k bits. A permutation
specifies, for each of the k input bits, the output position to which it goes. To specify a
completely randomly chosen permutation of the k-bits would take about k. log k.
Building Wireless Community Networks 2nd ed 2003
As we saw in Chapter 2, there is an astounding variety of wireless networking equipment available on the consumer market today. While the champion technology of wireless community networks is still 802.11b, simply choosing equipment that is "Wi-Fi" compliant won't necessarily guarantee a successful network project.
While equipment features, capabilities, and prices tend to change drastically in a short time, the essential network functions that they perform are still very straightforward. Let's look at what your devices need to provide in order to fulfill your wireless networking dreams.
Building Wireless Community Networks 1st ed 2002
Acknowledgments
I would like to thank the O'Reilly Network Team, my parents, and especially Cat for their
endless encouragement and keeping me sane (and, in some cases, even sensible).
Also, my sincere thanks to Schuyler Erle, Adam Flaherty, Nate Boblitt, and Jim Rosenbaum
for helping to turn the NoCat idea into an actual living project. Thanks as well to Matt
Peterson, Matt Westervelt Adam Shand, Terry Schmidt, and the countless other pioneers of
ultra-hyper-connectivity.
Thanks go to the reviewers and read early drafts and made comments: Mike Bertsch, Simson
Garfinkel, Justin Lancaster, Nicholas Maddix, and Matt Peterson. Thanks also go to all the
people at O'Reilly & Associates who turned this manuscript into a finished book: Sue Miller,
endless encouragement and keeping me sane (and, in some cases, even sensible).
Also, my sincere thanks to Schuyler Erle, Adam Flaherty, Nate Boblitt, and Jim Rosenbaum
for helping to turn the NoCat idea into an actual living project. Thanks as well to Matt
Peterson, Matt Westervelt Adam Shand, Terry Schmidt, and the countless other pioneers of
ultra-hyper-connectivity.
Thanks go to the reviewers and read early drafts and made comments: Mike Bertsch, Simson
Garfinkel, Justin Lancaster, Nicholas Maddix, and Matt Peterson. Thanks also go to all the
people at O'Reilly & Associates who turned this manuscript into a finished book: Sue Miller,
my editor; Leanne Soylemez, the production editor; graphic artist Rob Romano; Catherine
Morris, copyeditor; and Mary Anne Weeks Mayo, who provided quality control.
Applications and Services in Wireless Networks 2001
3.2 The MASA end-system
The MASA end-system is designed as a 3-level hierarchy consisting of QoS
Broker, Managers and Controllers as illustrated in Figure 2. With this structure,
the QoS Broker can delegate separate tasks for controlling and media processing
and therefore provides a clear separation of tasks with different time constraints.
Of equal importance is the provision of exibility for controlling various non-
MASA entities (e.g. a Mobile-IP deamon or special network interface card
drivers, etc.) The MASA Controller allows for an eased integration of such entities
into the framework. The Managers are used to integrate these controllers and to
provide a standardized open interface for the Broker. This allows for much more
scalable and flexible solutions as would be possible with a monolithic structure.
Broker, Managers and Controllers as illustrated in Figure 2. With this structure,
the QoS Broker can delegate separate tasks for controlling and media processing
and therefore provides a clear separation of tasks with different time constraints.
Of equal importance is the provision of exibility for controlling various non-
MASA entities (e.g. a Mobile-IP deamon or special network interface card
drivers, etc.) The MASA Controller allows for an eased integration of such entities
into the framework. The Managers are used to integrate these controllers and to
provide a standardized open interface for the Broker. This allows for much more
scalable and flexible solutions as would be possible with a monolithic structure.
Absolute Beginner's Guide to Wi-Fi Wireless Networking 2004
IntroductionIf you are new to Wi-Fi—wireless networking—I'd like to be your guide to this wonderful technology. I am no industry flak or starry-eyed gadget freak (although I do appreciate technology that makes life easier for people, like Wi-Fi). I want to be your guide to Wi-Fi, so it is fair for you to ask (and me to answer) some questions |
802.11 Wireles Networks The Definitive Guide
1.1 Why Wireless?
To dive into a specific technology at this point is getting a bit ahead of the story, though. Wireless
networks share several important advantages, no matter how the protocols are designed, or even what
type of data they carry.
The most obvious advantage of wireless networking is mobility. Wireless network users can connect to
existing networks and are then allowed to roam freely. A mobile telephone user can drive miles in the
course of a single conversation because the phone connects the user through cell towers. Initially,
mobile telephony was expensive. Costs restricted its use to highly mobile professionals such as sales
managers and important executive decision makers who might need to be reached at a moment's notice
regardless of their location. Mobile telephony has proven to be a useful service, however, and now it is
relatively common in the United States and extremely common among Europeans.
To dive into a specific technology at this point is getting a bit ahead of the story, though. Wireless
networks share several important advantages, no matter how the protocols are designed, or even what
type of data they carry.
The most obvious advantage of wireless networking is mobility. Wireless network users can connect to
existing networks and are then allowed to roam freely. A mobile telephone user can drive miles in the
course of a single conversation because the phone connects the user through cell towers. Initially,
mobile telephony was expensive. Costs restricted its use to highly mobile professionals such as sales
managers and important executive decision makers who might need to be reached at a moment's notice
regardless of their location. Mobile telephony has proven to be a useful service, however, and now it is
relatively common in the United States and extremely common among Europeans.
802.11 wi-fi handbook, Chapter 9 Wireless Lans in the network
Coverage Planning: The Site Survey
In the first chapter of Baby and Child Care, his seminal book on child rearing, Dr. Benjamin
Spock famously started with, “Trust yourself, you know more than you think you do.”
The idea was to reassure concerned and even frightened first-time parents that they
should trust their intuition when raising their children. After all, parents had managed
to raise their children before instruction manuals and trained professionals existed.
Parents then and now draw upon their experiences, their intuition, and the advice of
other parents. With all that said, in some more challenging situations, parents look to
professionals for guidance and assistance. And indeed, as Dr. Spock has told you, they
buy and read books on the subject.
Spock famously started with, “Trust yourself, you know more than you think you do.”
The idea was to reassure concerned and even frightened first-time parents that they
should trust their intuition when raising their children. After all, parents had managed
to raise their children before instruction manuals and trained professionals existed.
Parents then and now draw upon their experiences, their intuition, and the advice of
other parents. With all that said, in some more challenging situations, parents look to
professionals for guidance and assistance. And indeed, as Dr. Spock has told you, they
buy and read books on the subject.
802.11 Security 2002
Chapter 1. A Wireless World
Wireless networking is revolutionizing the way people work and play. By
removing physical constraints commonly associated with high-speed
networking, individuals are able to use networks in ways never possible in
the past. Students can be connected to the Internet from anywhere on
campus. Family members can check email from anywhere in a house.
Neighbors can pool resources and share one high-speed Internet connection.
Over the past several years, the price of wireless networking equipment has
dropped significantly. Wireless NICs are nearing the price of their wired
counterparts. At the same time, performance has increased dramatically. In
1998, Wireless Local Area Networks (WLAN) topped out at 2Mb/s. In
2002, WLANs have reached speeds of 54Mb/s and higher.
Unfortunately, wireless networking is a double-edged sword. Wireless users
have many more opportunities in front of them, but those opportunities open
up the user to greater risk. The risk model of network security has been
firmly entrenched in the concept that the physical layer is at least somewhat
secure. With wireless networking, there is no physical security. The radio
waves that make wireless networking possible are also what make wireless
networking so dangerous. An attacker can be anywhere nearby listening to
all the traffic from your networkxxxmdashxxxin your yard, in the parking lot
across the street, or on the hill outside of town. By properly engineering and
using your wireless network, you can keep attackers at bay.
Wireless networking is revolutionizing the way people work and play. By
removing physical constraints commonly associated with high-speed
networking, individuals are able to use networks in ways never possible in
the past. Students can be connected to the Internet from anywhere on
campus. Family members can check email from anywhere in a house.
Neighbors can pool resources and share one high-speed Internet connection.
Over the past several years, the price of wireless networking equipment has
dropped significantly. Wireless NICs are nearing the price of their wired
counterparts. At the same time, performance has increased dramatically. In
1998, Wireless Local Area Networks (WLAN) topped out at 2Mb/s. In
2002, WLANs have reached speeds of 54Mb/s and higher.
Unfortunately, wireless networking is a double-edged sword. Wireless users
have many more opportunities in front of them, but those opportunities open
up the user to greater risk. The risk model of network security has been
firmly entrenched in the concept that the physical layer is at least somewhat
secure. With wireless networking, there is no physical security. The radio
waves that make wireless networking possible are also what make wireless
networking so dangerous. An attacker can be anywhere nearby listening to
all the traffic from your networkxxxmdashxxxin your yard, in the parking lot
across the street, or on the hill outside of town. By properly engineering and
using your wireless network, you can keep attackers at bay.
Tuesday, October 9, 2007
VoIP for Dummies 2005
Where to Go from Here
The most important thing to keep in mind whenever you’re exploring a new
technology is how it fits into the larger picture. Take a global view.
Specifically, always be thinking, “How will this feature increase my company’s
efficiency?” Or, “How will an integrated network help promote collaboration
across my company?” Of course, you may also be wondering how you’ll save
money with VoIP.
technology is how it fits into the larger picture. Take a global view.
Specifically, always be thinking, “How will this feature increase my company’s
efficiency?” Or, “How will an integrated network help promote collaboration
across my company?” Of course, you may also be wondering how you’ll save
money with VoIP.
Teach Yourself TCP IP in 24 Hours 3rd Ed 2004
What You'll Learn in This Hour:
-
Encryption
-
Certificates
-
Securing TCP/IP
As you learned in the last hour, unauthorized users will go to great effort just to sneak onto other people's networks. The experts have been getting better at hiding TCP/IP communication so intruders can't learn secrets on the network. In this hour, you'll learn some of the important methods for securing TCP/IP.
At the completion of this hour, you'll be able to-
Define the terms encryption algorithm and encryption key
-
Discuss symmetric and asymmetric encryption
-
Describe digital signatures and digital certificates
-
Describe the TCP/IP security protocol systems SSL and IPSec
-
Explain what a virtual private network is and how it works
-
Describe the Kerberos authentication process
TCPIP Illustrated Volume 1
Link Layer 2.1 Introduction
From Figure 1.4 we see that the purpose of the link layer in the TCP/IP protocol suite is to send and receive (1) IP datagrams for the IP module, (2) ARP requests and replies for the ARP module, and (3) RARP requests and replies for the RARP module. TCP/IP supports many different link layers, depending on the type of networking hardware being used: Ethernet, token ring, FDDI (Fiber Distributed Data Interface), RS-232 serial lines, and the like.
In this chapter we'll look at some of the details involved in the Ethernet link layer, two specialized link layers for serial interfaces (SLIP and PPP), and the loopback driver that's part of most implementations. Ethernet and SLIP are the link layers used for most of the examples in the book. We also talk about the MTU (Maximum Transmission Unit), a characteristic of the link layer that we encounter numerous times in the remaining chapters. We also show some calculations of how to choose the MTU for a serial line.
TCP IP Network Administration 3rd ed 2002
Chapter 8. Configuring DNSCongratulations! You have installed TCP/IP in the kernel, configured the network interface, and configured routing. At this point, you have completed all of the configuration tasks required to run TCP/IP on a Unix system. While none of the remaining tasks is required for TCP/IP software to operate, they are necessary for making the network more friendly and useful. In the next two chapters, we look at how to configure basic TCP/IP network services. Perhaps the most important of these is name service. |
TCP IP Illustrated, Volume 2 The Implementation 1995
In the IP model, it is the network interfaces on a system (a host or a router) that are assigned addresses, not the system itself. In the case of a system with multiple interfaces, the system is multihomed and has more than one IP address. A router is, by definition, multihomed. As we'll see, this architectural feature has several subtle ramifications.
Five classes of IP addresses are defined. Class A, B, and C addresses support unicast communication. Class D addresses support IP multicasting. In a multicast communication, a single source sends a datagram to multiple destinations. Class D addresses and multicasting protocols are described in Chapter 12. Class E addresses are experimental. Packets received with class E addresses are discarded by hosts that aren't participating in the experiment.
TCP IP Foundations Aug 2004
Why We Need Protocols and Standards
Rules—or protocols and standards—are important to ensure compatibility
between different kinds of things. As more and more hardware and software vendors
began joining the technology explosion, there was no guarantee that any of
their products would be able to work with one another. A system had to be put
in place so that hardware and software consumers would not get burned by buying
incompatible systems.
Rules—or protocols and standards—are important to ensure compatibility
between different kinds of things. As more and more hardware and software vendors
began joining the technology explosion, there was no guarantee that any of
their products would be able to work with one another. A system had to be put
in place so that hardware and software consumers would not get burned by buying
incompatible systems.
TCP IP Analysis and Troubleshooting Toolkit 2003
You will quickly notice that many of the examples in the book are either
Cisco or Microsoft specific. Since those are the two most prevalent vendors in
use today, I have chosen to use examples pertaining to their systems. The
examples are by no means exclusive to either Cisco or Microsoft. In almost all
cases, you can take the examples and apply them to any vendor’s hardware or
software. Specific examples that apply to a certain vendor are noted. Along
this line, you might also notice several analysis tools mentioned or used in the
examples. The type of tool is not typically important, just as long as it provides
the functionality needed or described.
Cisco or Microsoft specific. Since those are the two most prevalent vendors in
use today, I have chosen to use examples pertaining to their systems. The
examples are by no means exclusive to either Cisco or Microsoft. In almost all
cases, you can take the examples and apply them to any vendor’s hardware or
software. Specific examples that apply to a certain vendor are noted. Along
this line, you might also notice several analysis tools mentioned or used in the
examples. The type of tool is not typically important, just as long as it provides
the functionality needed or described.
SNA and TCP IP Integration Handbook 1999
3.2 Virtual Machine
Virtual Machine/Enterprise Systems Architecture (VM/ESA) combines the VM/System Product (VM/SP), VM/SP High-Performance Option (VM/SP HPO), and VM/SP XA. VM/ESA facilities include APPC/VM VTAM support (AVS), VM/ESA facility that converts APPC/VM into APPC/VTAM protocol for communication throughout an SNA network; the group control system (GCS), a facility that manages subsystems that permit VM/ESA to interact within an SNA environment, the interactive problem control system (IPCS), a VM/ESA component that provides an operator with online capability for problem diagnosis and management; and the transparent services access facility (TSAF), a VM/ESA component that permits communication between programs by name specification instead of user or node ID.
Running IPv6 2006
IPv6—When?
IPv6 has been under development for the better part of 10 years, so the question when it is
going to claim its place under the sun isn’t easily answered. Some people say that if the protocol
was going to succeed, it would have done so by now. That doesn’t explain the incredible
amount of activity surrounding IPv6 that has only increased in the past years, though. Vendors
that had adopted a wait-and-see attitude before are now implementing the protocol into their
products. The adoption of IPv6 in the Internet community at large seems to be on the rise as
well, but not yet to the degree that IPv6 is becoming even close to mainstream, except maybe
in Japan and Korea.
The way things are going now, it looks like IPv6 isn’t going to run out of steam on its own
any time soon. Given enough time, it should fairly naturally ease into wider deployment. How
wide? Hard to say. IPv6 could quite possibly end up in a similar situation to that of the metric
system in the U.S.: it’s not something the general population knows or cares about, but certain
groups, such as scientists, doctors, and engineers, would be lost without it. On the other hand,
all the non-IP network protocols that are mentioned later in this chapter were very much in
use 10 to 15 years ago, but IPv4 has replaced them all. So we can’t rule out that IPv4 in turn will
be replaced by IPv6 over the course of the next 10 to 15 years.
going to claim its place under the sun isn’t easily answered. Some people say that if the protocol
was going to succeed, it would have done so by now. That doesn’t explain the incredible
amount of activity surrounding IPv6 that has only increased in the past years, though. Vendors
that had adopted a wait-and-see attitude before are now implementing the protocol into their
products. The adoption of IPv6 in the Internet community at large seems to be on the rise as
well, but not yet to the degree that IPv6 is becoming even close to mainstream, except maybe
in Japan and Korea.
The way things are going now, it looks like IPv6 isn’t going to run out of steam on its own
any time soon. Given enough time, it should fairly naturally ease into wider deployment. How
wide? Hard to say. IPv6 could quite possibly end up in a similar situation to that of the metric
system in the U.S.: it’s not something the general population knows or cares about, but certain
groups, such as scientists, doctors, and engineers, would be lost without it. On the other hand,
all the non-IP network protocols that are mentioned later in this chapter were very much in
use 10 to 15 years ago, but IPv4 has replaced them all. So we can’t rule out that IPv4 in turn will
be replaced by IPv6 over the course of the next 10 to 15 years.
Professional JavaScript For Web Developers 2005
The if statement
One of the most frequently used statements in ECMAScript (and indeed, in many languages), is the if
statement. The if statement has the following syntax:
if (condition) statement1 else statement2
One of the most frequently used statements in ECMAScript (and indeed, in many languages), is the if
statement. The if statement has the following syntax:
if (condition) statement1 else statement2
The condition can be any expression; it doesn’t even have to evaluate to an actual Boolean value.
ECMAScript converts it to a Boolean for you. If the condition evaluates to true, statement1 is executed;
if the condition evaluates to false, statement2 is executed. Each of the statements can be either a single
line or a code block (a group of code lines enclosed within braces). For example:
ECMAScript converts it to a Boolean for you. If the condition evaluates to true, statement1 is executed;
if the condition evaluates to false, statement2 is executed. Each of the statements can be either a single
line or a code block (a group of code lines enclosed within braces). For example:
Practical VoIP Security 2006
PBX Administration
Programs used for management of calls, and overall functionality of the PBX system,
allows administrators to keep the PBX system healthy and running. Management
interfaces handle calls by adding and deleting new extensions, updating routing
plans, enabling Call parking feature, monitoring conference calls, and much more.
User-friendly administration programs for complex PBX systems allow better overall
support.
Programs used for management of calls, and overall functionality of the PBX system,
allows administrators to keep the PBX system healthy and running. Management
interfaces handle calls by adding and deleting new extensions, updating routing
plans, enabling Call parking feature, monitoring conference calls, and much more.
User-friendly administration programs for complex PBX systems allow better overall
support.
Object-Oriented ActionScript For Flash 8 2006
The scoop with OOP?
Before OOP became commonplace, we had something called procedural programming,
which often required developers to write very complex and highly interdependent code.
A minor change to any part of the code could spell disaster for the entire application.
Debugging that type of application was a terribly painful and time-consuming task that
often resulted in the need to completely rebuild large pieces of code.
which often required developers to write very complex and highly interdependent code.
A minor change to any part of the code could spell disaster for the entire application.
Debugging that type of application was a terribly painful and time-consuming task that
often resulted in the need to completely rebuild large pieces of code.
When more and more user interaction got introduced in applications, it became apparent
that procedural programming wouldn’t cut it. Object-oriented programming was born as
an attempt to solve these very problems. Although it certainly isn’t the be-all and end-all
of successful programming, OOP does give developers a great tool for handling any
kind of application development.
that procedural programming wouldn’t cut it. Object-oriented programming was born as
an attempt to solve these very problems. Although it certainly isn’t the be-all and end-all
of successful programming, OOP does give developers a great tool for handling any
kind of application development.
Monday, October 8, 2007
Microsoft Windows Scripting Self-Paced Learning Guide 2004
Reading the registry and echoing the results on the screen are useful tasks. At times,
however, you need to perform repetitive operations. Even the most casual observer
knows that network administration involves many tasks performed over and over
again. As Yogi Berra once said, “It’s déjà vu all over again.”
How can you harness the power of VBScript to relieve some of the banality of day-today
network administration on Microsoft Windows Server 2003? At least four constructs
are ideal for the task:
however, you need to perform repetitive operations. Even the most casual observer
knows that network administration involves many tasks performed over and over
again. As Yogi Berra once said, “It’s déjà vu all over again.”
How can you harness the power of VBScript to relieve some of the banality of day-today
network administration on Microsoft Windows Server 2003? At least four constructs
are ideal for the task:
Javascript In 10 Simple Steps Or Less 2004
When working with data and variables in JavaScript, you need to be aware of
the data types you are using. Different data types are managed in different
ways, and it is important to understand a few fundamental data types.
the data types you are using. Different data types are managed in different
ways, and it is important to understand a few fundamental data types.
One such data type is a string. A string refers to any sequence of text that can
contain letters, numbers, and punctuation. When specifying a text string in
contain letters, numbers, and punctuation. When specifying a text string in
JavaScript, you need to enclose the string in single or double quotes. For
instance, the following are valid strings:
IPSec - The New Security Standard For The Internet, Intranets, And Virtual Private Networks, 2nd Ed 2003
IP Packets have no inherent security. It is relatively easy to forge the addresses of IP packets, modify the contents of IP packets, replay old packets, and inspect the contents of IP packets in transit. Therefore, there is no guarantee that IP datagrams received are (1) from the claimed sender (the source address in the IP header); (2) that they contain the original data that the sender placed in them; or (3) that the original data was not inspected by a third party while the packet was being sent from source to destination. IPSec is a method of protecting IP datagrams. This protection takes the form of data origin authentication, connectionless data integrity authentication, and data content confidentiality.
Sunday, October 7, 2007
iPod & iTunes - The Missing Manual, 4th Edition 2006
An iPod is many things to many people, but most people think of it as a pocket-size music player that holds 100 songs, 15,000 songs, or more, depending on the model. The iPod dynasty now ranges from a screenless 512-megabyte version that can hold plenty of songs for your gym routine and never skip a beat, to a 60-gigabyte multimedia jukebox that spins out an entire TV season of The Office, as well as color photos along with colorful music.
Like the original Sony Walkman, which revolutionized the personal listening experience when it was introduced in 1979, Apple's announcement of the original 5-gigabyte iPod in the fall of 2001 caught the music world's ear. "With iPod, listening to music will never be the same again," intoned Steve Jobs, Apple's CEO. But even out of the Hyperbolic Chamber, the iPod was different enough to get attention. People noticed it, and more importantly, bought it. By the end of 2005, Apple had sold more than 41 million of them. The iPod was the single bestselling music player on the market, the dominant player; for the first time in modern history, Apple got to feel like Microsoft.
IP In Wireless Networks 2003
As voice and data continue to converge, the Internet is becoming the focal point of attention and is taking on the role of the one single global network providing access to information as well as different types of services. But the Internet is not about to replace the existing voice networks, such as the public switched telephone network (PSTN) and other data networks, such as the ATM and frame relay networks, that are deployed on a global scale as well. The one thing that the Internet has yet to achieve is the reliability and security of the PSTN. But it is definitely on its way to achieving that factor of reliability and security. The Internet in its first generation has been mostly connected to fixed and wired end hosts. But as the world becomes increasingly wireless and people are more mobile and need constant connectivity, the Internet as we know it today will change. The Internet will grow in areas that make information access ubiquitous from any place on the earth.
Home Networking for Dummies 3rd Ed 2005
Believe it or not, installing the hardware and software you need on each computer
is not complicated at all. Start with the first computer, and go through
the process one step at a time. After you finish setting up that first computer,
you’ll see how logical and simple the tasks are.
In fact, anyone who knows how to turn on a computer and use the keyboard
and mouse can create a network in an amazingly short amount of time. Many
people who installed their own home networks found it so easy and satisfying
that they helped neighbors, friends, and relatives. Some have gone on to
neighborhood fame and fortune as part-time consultants to other households
who want home networks. They never give away the secret that all of this is
extremely easy to do.
is not complicated at all. Start with the first computer, and go through
the process one step at a time. After you finish setting up that first computer,
you’ll see how logical and simple the tasks are.
In fact, anyone who knows how to turn on a computer and use the keyboard
and mouse can create a network in an amazingly short amount of time. Many
people who installed their own home networks found it so easy and satisfying
that they helped neighbors, friends, and relatives. Some have gone on to
neighborhood fame and fortune as part-time consultants to other households
who want home networks. They never give away the secret that all of this is
extremely easy to do.
Data Networks IP and the Internet Protocols Design and Operation 2003
Nowadays every self-respecting person (particularly if a grandparent!) has a personal
email address. And many modern companies have encompassed ebusiness.
They have prestigious Internet ‘domain names’ (advertised with modern lower case
company names) and run Worldwide Web (www) sites for advertising and ordertaking.
What has stirred this revolution? The Internet. But when, why and how did
data networking and interworking start? And how did the Internet evolve? Where
will it lead? And what does all that frightful jargon mean? (What are the acronyms
and the protocols?). In this chapter we shall find out. We shall talk about the emergence
of computer networking, the Worldwide Web (www), about ISPs (Internet
service providers) and about where the Internet started—in the US Defense Department
during the 1970s. We discuss the significance of the Internet Protocol (IP)
today, and where it will lead. And most important of all—we start ‘unravelling’
the jargon.
email address. And many modern companies have encompassed ebusiness.
They have prestigious Internet ‘domain names’ (advertised with modern lower case
company names) and run Worldwide Web (www) sites for advertising and ordertaking.
What has stirred this revolution? The Internet. But when, why and how did
data networking and interworking start? And how did the Internet evolve? Where
will it lead? And what does all that frightful jargon mean? (What are the acronyms
and the protocols?). In this chapter we shall find out. We shall talk about the emergence
of computer networking, the Worldwide Web (www), about ISPs (Internet
service providers) and about where the Internet started—in the US Defense Department
during the 1970s. We discuss the significance of the Internet Protocol (IP)
today, and where it will lead. And most important of all—we start ‘unravelling’
the jargon.
A Professionals Guide To Data Communication In A TCPIP World 2004
Mail Transfer
Simple Mail Transfer Protocol (SMTP) is a procedure that facilitates the transfer of
electronic mail between hosts. SMTP provides message transfer. It does not manage
mailboxes or mail systems.
SMTP provides reliable, efficient processes for the transfer of electronic mail. It
transfers messages between clients and servers and between servers. Communication
is initiated by the user’s mail system, establishing a duplex connection to an
SMTP server. When the channel is established, the client informs the SMTP receiver
that it wishes to send mail. The client issues one or more commands that identify the
recipient(s) of the forthcoming message. The SMTP server establishes a duplex connection
to the final destination. The client notifies the server of its intention to send
mail and proceeds to send the message data. If the mail transfer is successful, the
server issues a receipt and the client closes the channel.
electronic mail between hosts. SMTP provides message transfer. It does not manage
mailboxes or mail systems.
SMTP provides reliable, efficient processes for the transfer of electronic mail. It
transfers messages between clients and servers and between servers. Communication
is initiated by the user’s mail system, establishing a duplex connection to an
SMTP server. When the channel is established, the client informs the SMTP receiver
that it wishes to send mail. The client issues one or more commands that identify the
recipient(s) of the forthcoming message. The SMTP server establishes a duplex connection
to the final destination. The client notifies the server of its intention to send
mail and proceeds to send the message data. If the mail transfer is successful, the
server issues a receipt and the client closes the channel.
Saturday, October 6, 2007
Networking For Dummies 7 Ed 2004
Welcome to the seventh edition of Networking For Dummies, the book that’s written especially for people who have this nagging feeling in the back of their minds that they should network their computers but haven’t a clue as to how to start or where to begin.
Do you often copy a spreadsheet file to a floppy disk and give it to the person in the next office so that he or she can look at it? Are you frustrated because you can’t use the fancy laser printer that’s on the financial secretary’s computer? Do you wait in line to use the computer that has the customer database? You need a network!
Do you often copy a spreadsheet file to a floppy disk and give it to the person in the next office so that he or she can look at it? Are you frustrated because you can’t use the fancy laser printer that’s on the financial secretary’s computer? Do you wait in line to use the computer that has the customer database? You need a network!
Friday, October 5, 2007
Networking All-In-One Desk Reference For Dummies 2004
Welcome to Networking All-in-One Desk Reference For Dummies, the one networking book that’s designed to replace an entire shelf full of the dull and tedious networking books you’d otherwise have to buy. This book contains all the basic and not-so-basic information you need to knowto get a network up and running and to stay on top of the network as it grows, develops problems, and encounters trouble.
Network+ Certification Study Guide 2000
Half-duplexing - A communication method, which can carry data in either direction but
not both directions at once.
Full-duplexing - A term used to describe a communications channel down which data
can travel in both directions at once.
can travel in both directions at once.
LAN - Local Area Network. A data communications network, which is geographically,
limited (typically to a 1 mile radius) allowing easy interconnection of terminals,
microprocessors and computers within adjacent buildings. Ethernet, Token-ring, and
FDDI are examples of standard LANs.
WAN - Wide Area Network. Usually constructed with serial lines, extending over
distances greater than one mile.
limited (typically to a 1 mile radius) allowing easy interconnection of terminals,
microprocessors and computers within adjacent buildings. Ethernet, Token-ring, and
FDDI are examples of standard LANs.
WAN - Wide Area Network. Usually constructed with serial lines, extending over
distances greater than one mile.
Network+ book 2001
If you are like the rest of the networking community, you probably havemany certifications. Certification is one of the best things you can do for your career in the computer or networking field. It proves that you know what you’re talking about when it comes to the area in which you are certified. In this book, you’ll find out what the Network+ exam is all about. Each chapter covers a part of the exam. At the end of each chapter, there are review questions to help you prepare for the exam.
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