How to do in FreeBSD Synfllod limit.
Somebody tell mi that in Linux is iptables -limit,
how to do in BSD system.
1.FreeBSD is not vulernable to this type of attack. For instance you can
make use of ICMP_BANDLIM kernel option, syncookie, etc.
In addition you may be interested in tcp and udp blackholes to avoid port
scans, which poses more risk.
2.In freebsd 4.x,it uses syncache+syncookie to defence the Synflood,and an
paper on BSD-Con02
also metioned that way.
All above answers are copied from bbs.tsinghua.edu.cn/FreeBSD board.