package/base-files/default/etc/sysctl.conf

   1 kernel.panic=3
   2 net.ipv4.conf.default.arp_ignore=1
   3 net.ipv4.conf.all.arp_ignore=1
   4 net.ipv4.ip_forward=1
   5 net.ipv4.icmp_echo_ignore_broadcasts=1
   6 net.ipv4.icmp_ignore_bogus_error_responses=1
   7 net.ipv4.tcp_fin_timeout=30
   8 net.ipv4.tcp_keepalive_time=120
   9 net.ipv4.tcp_syncookies=1
  10 net.ipv4.tcp_timestamps=0
  11 net.ipv4.ip_conntrack_tcp_timeouts="300 43200 120 60 120 120 10 60 30 120"
  12 net.ipv4.ip_conntrack_udp_timeouts="60 180"