2 Gateways on same subnet 1 Wan Interface



  • Hi,

    pfSense-2.0.1-RELEASE-i386
    i have 2 ISP's so apparently 2 modems/routers/gateways on my network
    first one has 192.168.1.254 which is the Cable Provider and the 2nd 192.168.1.253 which is the DSL Provider, they are connected to a switch - so there is only one WAN interface for pfsense available. On my machine i have a vbox running with pfsense installed. So this works fine.

    In short 2Gateways on the same subnet but only one "WAN" Interface

    I'd like to do load balancing between those 2 gateways.
    Multiple gateways are supported by pfsense - says the changelog.
    my pfsense setup so fare:
    Routes:
    GW1 - Cable - x.x.x.254
    GW2 - ADSL - x.x.x.243

    Now if multi GW would work, i should be able to define a firewall rule to route all traffic trough GWx. Not working - I have to change the default GW within the Interface settings to get pfsense to route packages trough a particular GW.

    Routing table looks like this:
    IPv4
    Destination Gateway Flags Refs Use Mtu Netif Expire
    default 192.168.1.254 UGS 0 694 1500 em0
    127.0.0.1 link#3 UH 0 63 16384 lo0
    192.168.1.0/24 link#1 U 0 4996 1500 em0
    192.168.1.250 link#1 UHS 0 0 16384 lo0
    192.168.2.0/24 link#2 U 0 85861 1500 em1
    192.168.2.250 link#2 UHS 0 0 16384 lo0

    So not even a sign of my 2nd Gateway at all.

    Any suggestions?



  • I case u dont have a solution, a quick hint would be nice to why it would not be possible.
    Just so i understand …
    Virtual IP Alias = a 2nd IP adress for the Interface or what does it mean?

    I split the 2 Gateways into 2 seperate subnets now but they are still physicaly linked.
    192.168.1.0 and 192.168.0.0
    with propper routes i should be able to reach both GW now shouldnt i?

    pfsense IPv4 routes
    Destination Gateway Flags Refs Use Mtu Netif Expire
    default 192.168.1.254 UGS 0 69 1500 em0
    127.0.0.1 link#3 UH 0 23 16384 lo0
    192.168.0.0/24 link#1 U 0 5 1500 em0
    192.168.0.250 link#1 UHS 0 0 16384 lo0
    192.168.1.0/24 link#1 U 0 2 1500 em0
    192.168.1.250 link#1 UHS 0 0 16384 lo0
    192.168.2.0/24 link#2 U 0 5990 1500 em1
    192.168.2.250 link#2 UHS 0 0 16384 lo0

    At least that is how it works under windows...



  • If you search the forums you will find many things on MultiWAN setups.



  • I did read every post of the past 2 Months Every … in German and Eng...
    Multi Wan yes but no solution on how to get 2 gw working on 1 interface
    Please constructive feedback - thanks



  • That introduces all kinds of complications with traffic routing and return routing. Save yourself a lot of headaches and don't do that. Put each gateway on its own interface and subnet.


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