I have (2) Watchguard M270's configured in a firecluster.
Interface 0 is the External interface configured with a /28 block.
Interface 1 is the LAN
We have consumed all of our IP's so I ordered another /28 block from our datacenter today. As soon as I configure Interface 2 for our new IP block, outbound traffic for the most part ceases to work on our network, however some things do work.. so we'll call it intermittent. As an example, I can ping out to 18.104.22.168 but can't ping 22.214.171.124. As soon as I disable Interface 2 that is configured for the new IP block, I am able to ping 126.96.36.199 again.
I'm assuming this is because we now have 2 WAN interfaces configured and outbound traffic doesn't know which interface it should be sending traffic out on but I couldn't be sure. I've made 4 calls to Watchguard support and nobody can identify the problem. I even had our datacenter issue us a different IP block just to rule out any kind of odd conflict but the problem persists with a new IP block.
Am I going about this all wrong trying to have 2 IP block's configured on our Watchguard? Is the better solution to just order a bigger block of IP's and re-IP everything? I was trying to avoid that hassle by just adding an additional block of IP addresses but it seems that what I'm trying to do here isn't working..
I would appreciate any advice or input that someone could give on this. Thank you!!