prep

case `uname -s` in
  Linux)
    sysctl -w kernel.threads-max=6000
    sysctl -w net.ipv4.ip_local_port_range="1024 61000"
    sysctl -w net.ipv4.tcp_tw_recycle=1
    sysctl -w net.ipv4.tcp_tw_reuse=1
    sysctl -w net.ipv4.tcp_fin_timeout=10
    ;;
  FreeBSD)
    sysctl -w kern.maxfiles=11000
    sysctl -w kern.maxfilesperproc=11000
    sysctl -w kern.maxproc=6000
    sysctl -w kern.maxprocperuid=6000
    sysctl -w net.inet6.ip6.v6only=0
    sysctl -w net.inet.ip.portrange.first=2000
    sysctl -w net.inet.ip.portrange.hifirst=2000
    sysctl -w net.inet.ip.portrange.randomized=0
    ;;
  OpenBSD)
    sysctl -w kern.maxfiles=11000
    sysctl -w kern.maxproc=6000
    sysctl -w net.inet6.ip6.v6only=0
    ;;
  NetBSD)
    sysctl -w kern.maxfiles=11000
    sysctl -w kern.maxproc=6000
    sysctl -w net.inet6.ip6.v6only=0
    sysctl -w net.inet.ip.anonportmin=1024
    sysctl -w net.inet.ip.anonportmax=65535
    sysctl -w net.inet6.ip6.anonportmin=1024
    sysctl -w net.inet6.ip6.anonportmax=65535
    ;;
  AIX)
    chdev -l sys0 -a maxuproc=11000
    no -o tcp_ephemeral_low=1024
    ;;
esac