Packet Capture and Traffic Analysis.

Useful links :

1) Socket Programming Basics
http://www.security-freak.net/sockets/socket-programming.html


2) Packet Sniffing using Raw Sockets
http://www.security-freak.net/raw-sockets/raw-sockets.html


3) Packet Injection using Raw Sockets
http://www.security-freak.net/packet-injection/packet-injection.html


4) Architecture of A Proactive Security Tool
http://www.security-freak.net/architecture/architecture.html


5) Encryption Basics using RC4
http://www.security-freak.net/encryption/encryption-rc4.html


6) How do WORMS work?
http://www.security-freak.net/worms/worms.html

7) Madwifi-NG Wireless Driver Compilation Basics
http://www.security-freak.net/tools/sohail/madwifi-driver-building/madwifi-driver-presentation.html
http://www.security-freak.net/tools/sohail/madwifi-compilation-1/madwifi-compilation.html
http://www.security-freak.net/tools/sohail/madwifi-compilation-2/madwifi-compilation-2.html
http://www.security-freak.net/tools/sohail/madwifi-compilation-3/madwifi-compilation-3.html
http://www.security-freak.net/tools/sohail/wireshark-wireless/wireshark-wireless.html

Tutorials on commonly used Security Tools
http://www.security-freak.net/tools/nmap/nmap.html
http://www.security-freak.net/tools/dig/dig.html
http://www.security-freak.net/tools/nc/nc.html
http://www.security-freak.net/tools/amit/airdecap-ng/airdecap-ng.html
http://www.security-freak.net/tools/ngrep/ngrep.html
http://www.security-freak.net/tools/wireshark/wireshark.html
http://www.security-freak.net/tools/nbtscan/nbtscan.html
http://www.security-freak.net/tools/amit/airodump-ng/airodump-ng.html
http://www.security-freak.net/tools/amit/airodump-ng/airodump-ng.html
http://www.security-freak.net/tools/amit/pcap2air-airbase/pcap2air.html
http://www.security-freak.net/tools/amit/pcap2air-airbase/pcap2air.html
http://www.security-freak.net/tools/amit/prism-strip/prism-strip-airbase.html
http://www.security-freak.net/tools/amit/simple-replay-airbase/simple-replay.html