Someone

net.inet.ip.rtexpire=2
net.inet.icmp.icmplim=10
net.inet.icmp.maskrepl=0
net.inet.icmp.drop_redirect=1
net.inet.tcp.icmp_may_rst=0
net.inet.tcp.drop_synfin=1
net.inet.tcp.msl=7500
net.inet.tcp.keepidle=10000
net.inet.tcp.delayed_ack=0
net.inet.ip.fw.one_pass=0
net.inet.ip.rtminexpire=2
net.inet.ip.rtmaxcache=256
kern.ipc.shmmax=134217728
kern.ipc.shmall=32768
kern.ipc.semmap=256
kern.ipc.nmbclusters=32768
kern.ipc.somaxconn=65535
net.inet.tcp.blackhole=2
net.inet.udp.blackhole=1

net.inet.tcp.fast_finwait2_recycle=1
net.inet.tcp.finwait2_timeout=5000