Can anyone tell me if it is possible to use multiple WAN interfaces to different ISPs in ISA 2004? I have it configured with two external NICs now, but ISA randomly ignores one inferface and publishes all its services on the other one after each reboot. It switches back and forth so that only one is ever functioning at a time.
It is possible but there is some configuration there are articles on this website written by Tom explaining some of the features. You must also understand routing and create specific rules. Remeber that this configuration can become complex and you will need to document it.
There are also applicaions that make this porcess easier like rainwall etc etc.
I remember reading something about multiple WAN interfaces on ISA for failover without using an add-on product. However, if you really want loadbalancing then I think an add-on product such as Rainconnect from Rainfinity is needed.
Ricky, can you post some pointers to those articles?
I want to publish services for public use on two NICs with external IPs. Both go to different ISPs. I'd like them to run at the same time. To clarify the default gateway thing, I meant I don't care which ISP the internal client traffic goes out on. I guess that was a little misleading.
Currently, the server will pick one NIC or the other. If I disable one, the other takes over all the service publishing. If I reboot, it picks a random external NIC to put the services on.