ISA 2006 standard NIC Issue

Hi guys,

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).

Thanks
bmsdevAsked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

x
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

simonlimonCommented:
I think you just replace the NIC, and insert all of the NIC's IP adresses and that is it.

0
bmsdevAuthor Commented:
can someone else confirm this?
0
Keith AlabasterEnterprise ArchitectCommented:
This is not how ISA is designed to operate - as I am sure you know.
0
Redefine Your Security with AI & Machine Learning

The implications of AI and machine learning in cyber security are massive and constantly growing, creating both efficiencies and new challenges across the board. Check out our on-demand webinar to learn more about how AI can help your organization!

simonlimonCommented:
If you look at the procedure how to migrate ISA from another,

- Export configuration,
-Assign network (same) adresses to new server,
- Import configuration to new server.

Of course I wouldn't perform this blindly, I would definitely test this first. Maybe on a desktop with 2 or 3 different NIC cards. And perfrom the NIC "swap" on Vmware Workstation? See how that turns out.
0
bmsdevAuthor Commented:
Thanks SimonLimon, Keith alabaster can you clarify what you meant by "this is not how ISA is designed to operate"

thanks
0
Keith AlabasterEnterprise ArchitectCommented:

On a supported environment, ISA can have only one external nic there fore that nic would need to support both the OWA and the internet proxy function for the users. They should not be on separate nics, as your initial post suggests.
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
bmsdevAuthor Commented:
partially answered my question although not fully
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Networking Hardware-Other

From novice to tech pro — start learning today.