Linux/iptables

Tables Chains FILTER INPUT OUTPUT FORWARD NAT PREROUTING OUTPUT POSTROUTING MANGLE (modify ip headers) PREROUTING POSTROUTING OUTPUT INPUT FORWARD RAW (connection tracking) PREROUTING OUTPUT SECURITY		Targets REJECT DROP ACCEPT RETURN MASQUERADE

Basics

sudo iptables CHAINRULE [-j target]

raspi wifi to ethernet

• rc.local
  • iptables --table nat --append POSTROUTING --out-interface wlan0 -j MASQUERADE
  • iptables --append FORWARD --in-interface eth0 -j ACCEPT