Something

kern.maxfiles=65535
kern.maxfilesperproc=32765
kern.ipc.somaxconn=4096
kern.ipc.shmmax=409600000
kern.ipc.maxsockbuf=2097152

kern.polling.enable=1
kern.polling.user_frac=5
kern.polling.burst_max=1250
kern.polling.poll_in_trap=1

net.inet.ip.portrange.last=65535
net.inet.ip.intr_queue_maxlen=4096
net.inet.ip.forwarding=1
net.inet.ip.fastforwarding=1
net.inet.ip.fw.dyn_max=131070
net.inet.ip.fw.dyn_ack_lifetime=45

net.inet6.ip6.v6only=0

net.inet.tcp.delayed_ack=0
net.inet.tcp.sendspace=65535
net.inet.tcp.recvspace=65535
net.inet.tcp.keepidle=600000
net.inet.tcp.mssdflt=1460
net.inet.tcp.msl=7500
net.inet.tcp.rfc1644=0
net.inet.tcp.drop_synfin=1
net.inet.tcp.path_mtu_discovery=0
net.inet.tcp.blackhole=2

net.inet.udp.blackhole=1

net.inet.icmp.icmplim=2000
net.inet.icmp.drop_redirect=1