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

   1 kernel.panic=3
   2 net.ipv4.ip_forward=1
   3 net.ipv4.icmp_echo_ignore_broadcasts=1
   4 net.ipv4.icmp_ignore_bogus_error_responses=1
   5 net.ipv4.tcp_fin_timeout=30
   6 net.ipv4.tcp_keepalive_time=120
   7 net.ipv4.tcp_timestamps=0
   8 net.ipv4.tcp_vegas_cong_avoid=1