Hello all. I am a programmer in C++. Though I have never ventured into netowork programming. I've picked up running security tests for people, but I wanna write my own programs in linux. Can someoen send me a site on writing linux port scanners, ect

A good place to start would be the canonical Beej's Guide to Network Programming.

Ah, thank you

Won't teach you any coding, but Firewalls and Internet Security: Repelling the Wily Hacker by William R. Cheswick, Steven M. Bellovin, and Aviel D. Rubin is a good overview for securing a UNIX-like machine.

Ah thanks to you too