BRIDGE two interface subnets



  • Hello,

    I have a very curious situation here.
    I have a box with 6 interfaces. 3 of them are configured as WANs and 2 of them as LAN and SUBNET.
    The LAN CIDR is 192.168.0.0/24.
    The SUBNET CIDR is 192.168.1.0/24.
    In the SUBNET interface there is an unmanaged switch which is connected to just one device(let's call it DEVICE), with ip 192.168.1.254.
    For reasons irrelevant to this post I cannot change the IP of the DEVICE, but it has to be able to connect to the outside world(Internet).

    In the SUBNET interface I have configured only the Static IP and the DHCP server.
    I have bridged the two interfaces from the Interfaces->Assign->Bridges menu.
    I have added a SUBNET firewall rule that looks like:

    IPv4 * * * * * * none

    Now I can ping the DEVICE from the SUBNET interface(Diagnostics->Ping) but I cant from the LAN interface.

    I have done the exact same thing to a router with an internal WIFI antenna to bridge Wifi and LAN interfaces and it worked flawlessly.
    What am I doing wrong here?

    I have tried setting SUBNET's ip address to None but then I can't ping the DEVICE from the Ping menu.

    Thank you and sorry for the long post. I am trying to provide as much details as possible


  • Netgate

    Why would you bridge that? You don't use a layer 2 bridge between two different layer 3 networks.

    Just enable Internet access from SUBNET…



  • OK…
    But how?
    ??? ??? ???



  • And secondly, if I do that will I be able to port forward the DEVICE to the outside world?


  • Netgate

    Add the proper firewall rules to SUBNET. If you have not enabled Manual Outbound NAT is should "just work." Look at the rules on LAN. Duplicate it for SUBNET.