# uname -a
FreeBSD HF1 8.3-RELEASE FreeBSD 8.3-RELEASE #0: Mon Apr 9 21:23:18 UTC 2012 root@mason.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC amd64
# egrep -v '#|^$' /etc/sysctl.conf
net.inet.tcp.blackhole=2
net.inet.udp.blackhole=1
kern.ipc.somaxconn=4096
net.inet.tcp.sendspace=65536
net.inet.tcp.recvspace=65536
net.inet.tcp.msl=15000
net.inet.icmp.icmplim=50
net.inet.icmp.drop_redirect=1
net.inet.icmp.log_redirect=1
net.inet.tcp.drop_synfin=1
kern.ipc.nmbclusters=400000
net.inet.tcp.maxtcptw=40960
kern.ipc.maxsockets=204800
net.inet.ip.portrange.first=1000
net.inet.ip.portrange.last=65535
net.inet.ip.portrange.randomized=0
kern.ipc.maxsockbuf=83886080