I have two interfaces that I'd like to have on the same subnet. How do I do it?



  • Despite having experience in Tomato, pfSense is a whole new level for me. I'd like to request a tutorial to setup my two interfaces into a single subnet.

    The documentation in the FAQ on bridges seems to be incomplete and I have no idea what I should do. Thank you in advance for your reply.


  • LAYER 8 Global Moderator

    You prob wont find mind info because there is really ever any reason to do it.  Can I ask why you would want/need to do such a thing?



  • @johnpoz:

    You prob wont find mind info because there is really ever any reason to do it.  Can I ask why you would want/need to do such a thing?

    Thanks for your quick reply. The reason is because I have three ethernet interfaces and I want to use two of them in a switched manner. But if I have two different subnets my computers can't detect each other in Windows automatically.

    This is probably a really simple configuration I'm trying to achieve but in pfSense I can't seem to get the firewall rules correct. Although what I've done so far allows devices on both interfaces to get a DHCP address from the same DHCP server, I can never set the firewall rules right and traffic cannot get in or out.

    I hope that makes sense. I think in simpler terms all I'm trying to do is bridge two interfaces together and get devices to connect to the internet as well as have the ability to talk to each other.


  • LAYER 8 Global Moderator

    Yeah that is not a good reason like I thought ;)  Get a switch if you want to have switch ports.  While it is possible to bridge interfaces, they are not going to perform like a switch.. You can get gig switch for $20 that will clearly outperform 2 interfaces bridged ;)

    What is your problem when you put your devices in 2 different segments.  If you were going to put them in the same segment why don't you just make the firewall rules any any then?  No broadcasting for names is not going to work.

    What are you wanting to do with your windows machines that you can not do with 2 segments?



  • @johnpoz:

    Yeah that is not a good reason like I thought ;)  Get a switch if you want to have switch ports.  While it is possible to bridge interfaces, they are not going to perform like a switch.. You can get gig switch for $20 that will clearly outperform 2 interfaces bridged ;)

    What is your problem when you put your devices in 2 different segments.  If you were going to put them in the same segment why don't you just make the firewall rules any any then?  No broadcasting for names is not going to work.

    What are you wanting to do with your windows machines that you can not do with 2 segments?

    Yeah that's what I'm going to do now  :-.

    Well one of my Windows machines are acting as a DLNA server but it seems that any device on the other interface are only scanning their own subnet. So basically they're isolated from each other rather than being pooled into the same network as how I intended it to be. Even then I'm not sure how to setup the firewall rules to allow these two interfaces to communicate with each other.

    I really wish there was a easy way to accomplish this. It's unfortunate that this software is missing the documentation to do it. I thought I was getting pretty close when I created the bridge and got both interfaces to communicate with the same DHCP server but then traffic couldn't be passed :(.


  • LAYER 8 Netgate

    There is an easy way.  Use a switch.



  • @Derelict:

    There is an easy way.  Use a switch.

    Thanks. I'm extremely grateful for all of your advice.

    The kind people on this forum have been phenomenal.


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