DNS Open Resolver issue


I have a problem, one of my clients Windows Small Business Server 2008 has an open DNS resolver, I have being informed by the ISP Abuse department that I need to shut down the open DNS Resolver, and that it is created by some kind of attack. I disabled the DNS recursion, but this disables the forwarders and subsequently all access to the Internet. I am no DNS expert, any and all help would be greatly appreciated.

Thank you.
Who is Participating?
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.

Emmanuel AdebayoGlobal Windows Infrastructure Engineer - ConsultantCommented:

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
the problem is not that recursion is enabled.

somehow you are providing dns services to the outside world.
if you are not hosting a dns zone, you can firewall port 53, otherwise you need to configure your dns server to reject queries from wan clients except for the zone you are hosting
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

From novice to tech pro — start learning today.