hello friends...
i want to know from where can i get a sample source code of a firewall in C languge. i want to code my own firewall , just to learn how a firewall works... and how to program it.. but i am not able to locate any source anywhere... i have also searched google.com but it takes me to some sites which shows "what is firewall ?"

but i need some basic source code .... in C language...

can anybody help me ....

intruder