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

raspi wifi to ethernet

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