router.sh

router.sh

#!/bin/sh

# The interface that has outbound connectivity to the Internet
GATEWAY_INTERFACE=p2p1

# What network interfaces do you want to allow routing out via this router
INTERNAL_INTERFACES="p4p1.254
p4p1.239
p4p1.236"

echo "Setting up routing..."
echo "[${GATEWAY_INTERFACE}] GATEWAY INTERFACE"

echo 1 > /proc/sys/net/ipv4/ip_forward

iptables -F
iptables -X
iptables -t nat -F
iptables -t nat -X
iptables -t mangle -F
iptables -t mangle -X
iptables -P INPUT ACCEPT
iptables -P FORWARD ACCEPT
iptables -P OUTPUT ACCEPT
iptables -t nat -A POSTROUTING -o p2p1 -j MASQUERADE
for I in ${INTERNAL_INTERFACES}
do
	echo "[${I}] -> [${GATEWAY_INTERFACE}]"
	iptables -A FORWARD -i ${I} -o ${GATEWAY_INTERFACE} -m state --state RELATED,ESTABLISHED -j ACCEPT
	iptables -A FORWARD -i ${I} -o ${GATEWAY_INTERFACE} -j ACCEPT
done
echo "Routing complete"
echo
echo "Routing Table"
netstat -rn
echo
echo "[IPTABLES: NAT]"
iptables -t nat -L -n -v
echo
echo "[IPTABLES: FORWARD]"
iptables -L -n -v
echo