Showing posts with label Network. Show all posts
Showing posts with label Network. Show all posts
Information Security: A Manager’s Guide To Thwarting Data Thieves and Hackers
Information Security: A Manager’s Guide To Thwarting Data Thieves and Hackers
March 2008 | English | 189 Pages | PDF | 4.7 MB
March 2008 | English | 189 Pages | PDF | 4.7 MB
Organizations with computer networks, Web sites, and employees carrying laptops and Blackberries face an array of security challenges. Among other things, they need to keep unauthorized people out of the network, thwart Web site hackers, and keep data safe from prying eyes or criminal hands.
This book provides a high-level overview of these challenges and more. But it is not for the hard-core IT security engineer who works full time on networks. Instead, it is aimed at the nontechnical executive with responsibility for ensuring that information and assets stay safe and private. Written by a practicing information security officer, Philip Alexander, the book contains the latest information and arms readers with the knowledge they need to make better business decisions.
http://hotfile.com/dl/92273677/8a5cec3/Information.Security.rar_tutotraining.com.html
How to Trace Any IP Address
In fact tracing an IP address is very simple and easy than we think. There exists many websites through which you can trace any IP address back to it’s source. One of my favorite site is ip2location.com. Just go to http://www.ip2location.com/demo.aspx and enter the IP address that you want to trace in the dialog box and click on “Find Location”‘. With just a click of a button you can find the following information for any given IP address.
1. Country in which the IP is located
2. Region
3. City
4. Latitude/Longitude
5. Zip Code
6. Time Zone
7. Name of the ISP
8. Internet Speed
9. Weather Station
10. Area Code and
11. Domain name associated with the IP address.
A sample snapshot of the results from ip2location.com is given below
What is Network Analysis and Sniffing?
Network analysis is the process of capturing network traffic and inspecting it closely to determine what is happening on the network. A network analyzer decodes, or dissects, the data packets of common protocols and displays the network traffic in human-readable format. Network analysis is also known by several other names: traffic analysis, protocol analysis, sniffing, packet analysis, and eavesdropping to name a few. Sniffing tends to be one of the most popular terms in use today. However, as you will see later in this chapter, due to malicious users it has had a negative connotation in the past.
A network analyzer can be a standalone hardware device with specialized software, or it can simply be software that you install on your desktop or laptop computer. Network analyzers are available both free and commercially. Differences between network analyzers tend to depend on features such as the number of supported protocol decodes, the user interface, and graphing and statistical capabilities. Other differences include inference capabilities, such as expert analysis features, and the quality of packet decodes. Although several network analyzers all decode the same protocols, some may decode better than others.
A network analyzer is a combination of hardware and software. Although there are differences in each product, a network analyzer is composed of five basic parts:
- Hardware Most network analyzers are software-based and work with standard operating systems (OSs) and network interface cards (NICs). However, there are some special hardware network analyzers that offer additional benefits such as analyzing hardware faults including: Cyclic Redundancy Check (CRC) errors, voltage problems, cable problems, jitter, jabber, negotiation errors, etc. Some network analyzers only support Ethernet or wireless adapters, while others support multiple adapters and allow users to customize their configuration. Sometimes you will also need a hub or a cable tap to connect to the existing cable.
- Capture driver This is the part of a network analyzer that is responsible for actually capturing the raw network traffic from the cable. It will also filter out the traffic that you want and store the data in a buffer. This is the core of a network analyzer and you cannot capture data without it.
- Buffer This component stores the captured data. Data can be stored in a buffer until it is full, or in a rotation method such as “round robin” where the newest data replaces the oldest data. Buffers can be disk-based or memory-based.
- Real-time analysis This feature analyzes the data as it comes off the cable. Some network analyzers use this to find network performance issues, and network intrusion detection systems do this to look for signs of intruder activity.
- Decode This component displays the contents of the network traffic with descriptions so that it is human-readable. Decodes are specific to each protocol, so network analyzers tend to vary in the number of decodes they currently support. However, new decodes are constantly being added to network analyzers.
