package/base-files/files/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_ecn=0
   8 net.ipv4.tcp_fin_timeout=30
   9 net.ipv4.tcp_keepalive_time=120
  10 net.ipv4.tcp_syncookies=1
  11 net.ipv4.tcp_timestamps=1
  12 net.ipv4.tcp_sack=1
  13 net.ipv4.tcp_dsack=1
  14
  15 net.ipv6.conf.default.forwarding=1
  16 net.ipv6.conf.all.forwarding=1
  17
  18 net.netfilter.nf_conntrack_acct=1
  19 net.netfilter.nf_conntrack_checksum=0
  20 net.netfilter.nf_conntrack_max=16384
  21 net.netfilter.nf_conntrack_tcp_timeout_established=3600
  22 net.netfilter.nf_conntrack_udp_timeout=60
  23 net.netfilter.nf_conntrack_udp_timeout_stream=180
  24
  25 # disable bridge firewalling by default
  26 net.bridge.bridge-nf-call-arptables=0
  27 net.bridge.bridge-nf-call-ip6tables=0
  28 net.bridge.bridge-nf-call-iptables=0