we have an issue with our ISA server 2006. the server is in the DMZ with an internal facing NIC and two DMZ NICs. one NIC is for OWA and the other is used for internet Proxy for our users.
Recentlly last couple of days we have had network issues on the NIC that provides the proxy for our users. Somehow the NIC fails to respond to any requests. the NIC is pingable however no traffic is going throught it hence our users get an ISA error message when browsing a web page.
The only way to make this NIC "active" again is to change the subnet mask to say 16 bit and then change it back to 24 bit apply the changes and the NIC is active again and the internet is working.
I know this is not an ISA issue as OWA on the other nic works fine.
I belove the NIC is faulty or the cable is faulty.
My question to you is if i was to disable this NIC and replace it with another NIC do i need to reconfigure ISA to use this new NIC (bearing in mind that when i disable the faulty NIC i will re-apply the IP config to the new NIC).