Linux router with diffent gateways for incomming and outgoing connections
- by nkout
I have the following topology:
LAN Users:192.168.1.2 - 254 (192.168.1.0/24)
gateway1: 192.168.2.2/24 used for all outgoing connections of LAN users (default gateway)
gateway2: 192.168.3.2/24 used for incoming services (destination NAT, ports 80,443 are forwarded to 192.168.2.1)
linux router-server R
eth0 192.168.1.1/24: LAN
eth1 192.168.2.1/24: WWAN1
eth2 192.168.3.1/24: WWAN2
I want to:
route all outgoing traffic coming from LAN and R via 192.168.2.2
route the responses to incoming connections via 192.168.3.2
My config:
ifconfig eth0 up 192.168.1.1 netmask 255.255.255.0
ifconfig eth1 up 192.168.2.1 netmask 255.255.255.0
ifconfig eth2 up 192.168.3.1 netmask 255.255.255.0
echo 0 >/proc/sys/net/ipv4/ip_forward
route add default gw 192.168.2.2
iptables -t nat -A POSTROUTING -d !192.168.0.0/16 -j MASQUERADE
I want to add iptables rule to mark incoming traffic from WWAN2 and send back the responses to WWAN2,
while keeping default gateway on WWAN1
