Can I route all outbound traffic through one interface on Linux?












0















I'm using a Raspberry Pi with Raspbian GNU/Linux 9.6 (stretch) as a firewall.



I would like to:




  1. route all traffic to 192.168.1.1 through eth0 (192.168.1.144), where 192.168.1.1 is the router that connects to the internet

  2. route all traffic to the rest of the home network 192.168.1.0/24 through eth1 (192.168.1.196)

  3. route all traffic coming from the various access points (dd-wrt routers, 192.168.1.2, 192.168.1.36 and 192.168.1.72 respectively) to 192.168.1.196

  4. and from there to 192.168.1.144 and out to the internet via 192.168.1.1


How should I set this up?



These two questions seem to give conflicting answers, at least to networking-rookie-me:




  • Forwarding all incoming traffic on eth0 to go to eth1


  • Is it possible to configure a NAT routing device to have the same subnet on both WAN and LAN interfaces?


Thanks






linux networking







share|improve this question























  • Does your RaspPi do NAT (network access translation)? Do you have any actual firewall rules (iptables or packages using iptables)? If no to both questions, it's a pure routing problem, and you can solve it with policy routing (google) for the "route traffic from ..." cases. A bunch of routing rules should suffice.

    – dirkt
    Jan 23 at 6:14
















0















I'm using a Raspberry Pi with Raspbian GNU/Linux 9.6 (stretch) as a firewall.



I would like to:




  1. route all traffic to 192.168.1.1 through eth0 (192.168.1.144), where 192.168.1.1 is the router that connects to the internet

  2. route all traffic to the rest of the home network 192.168.1.0/24 through eth1 (192.168.1.196)

  3. route all traffic coming from the various access points (dd-wrt routers, 192.168.1.2, 192.168.1.36 and 192.168.1.72 respectively) to 192.168.1.196

  4. and from there to 192.168.1.144 and out to the internet via 192.168.1.1


How should I set this up?



These two questions seem to give conflicting answers, at least to networking-rookie-me:




  • Forwarding all incoming traffic on eth0 to go to eth1


  • Is it possible to configure a NAT routing device to have the same subnet on both WAN and LAN interfaces?


Thanks






linux networking







share|improve this question























  • Does your RaspPi do NAT (network access translation)? Do you have any actual firewall rules (iptables or packages using iptables)? If no to both questions, it's a pure routing problem, and you can solve it with policy routing (google) for the "route traffic from ..." cases. A bunch of routing rules should suffice.

    – dirkt
    Jan 23 at 6:14














0












0








0








I'm using a Raspberry Pi with Raspbian GNU/Linux 9.6 (stretch) as a firewall.



I would like to:




  1. route all traffic to 192.168.1.1 through eth0 (192.168.1.144), where 192.168.1.1 is the router that connects to the internet

  2. route all traffic to the rest of the home network 192.168.1.0/24 through eth1 (192.168.1.196)

  3. route all traffic coming from the various access points (dd-wrt routers, 192.168.1.2, 192.168.1.36 and 192.168.1.72 respectively) to 192.168.1.196

  4. and from there to 192.168.1.144 and out to the internet via 192.168.1.1


How should I set this up?



These two questions seem to give conflicting answers, at least to networking-rookie-me:




  • Forwarding all incoming traffic on eth0 to go to eth1


  • Is it possible to configure a NAT routing device to have the same subnet on both WAN and LAN interfaces?


Thanks






linux networking







share|improve this question














I'm using a Raspberry Pi with Raspbian GNU/Linux 9.6 (stretch) as a firewall.



I would like to:




  1. route all traffic to 192.168.1.1 through eth0 (192.168.1.144), where 192.168.1.1 is the router that connects to the internet

  2. route all traffic to the rest of the home network 192.168.1.0/24 through eth1 (192.168.1.196)

  3. route all traffic coming from the various access points (dd-wrt routers, 192.168.1.2, 192.168.1.36 and 192.168.1.72 respectively) to 192.168.1.196

  4. and from there to 192.168.1.144 and out to the internet via 192.168.1.1


How should I set this up?



These two questions seem to give conflicting answers, at least to networking-rookie-me:




  • Forwarding all incoming traffic on eth0 to go to eth1


  • Is it possible to configure a NAT routing device to have the same subnet on both WAN and LAN interfaces?


Thanks






linux networking




linux networking






share|improve this question













share|improve this question











share|improve this question




share|improve this question










asked Jan 22 at 6:40









simonesimone

1215




1215













  • Does your RaspPi do NAT (network access translation)? Do you have any actual firewall rules (iptables or packages using iptables)? If no to both questions, it's a pure routing problem, and you can solve it with policy routing (google) for the "route traffic from ..." cases. A bunch of routing rules should suffice.

    – dirkt
    Jan 23 at 6:14



















  • Does your RaspPi do NAT (network access translation)? Do you have any actual firewall rules (iptables or packages using iptables)? If no to both questions, it's a pure routing problem, and you can solve it with policy routing (google) for the "route traffic from ..." cases. A bunch of routing rules should suffice.

    – dirkt
    Jan 23 at 6:14

















Does your RaspPi do NAT (network access translation)? Do you have any actual firewall rules (iptables or packages using iptables)? If no to both questions, it's a pure routing problem, and you can solve it with policy routing (google) for the "route traffic from ..." cases. A bunch of routing rules should suffice.

– dirkt
Jan 23 at 6:14





Does your RaspPi do NAT (network access translation)? Do you have any actual firewall rules (iptables or packages using iptables)? If no to both questions, it's a pure routing problem, and you can solve it with policy routing (google) for the "route traffic from ..." cases. A bunch of routing rules should suffice.

– dirkt
Jan 23 at 6:14










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