freeBSD tcp enhancement

[Chuck Swiger]

Amit Mondal wrote:
> I am a newbie to freeBSD. I am trying to modify freeBSD tcp for some
> security ehancement. Could anyone pls point me to how/where to start or any
> suitable material/tutorial to start with.

The classic IPv4 code lies in /usr/src/sys/netinet, but see netinet6, 
netipsec, and even netgraph.

If you want to hack on a TCP/IP stack, have fun, but it's entirely possible 
that the problem you're trying to solve already has been....

-- 
-Chuck