Extremely slow internet for users Server 2012 R2

Hi there,

We have just installed a new Server running Server 2012 R2, the server is a domain controller and runs exchange.

However our users are reporting extremely slow internet and sometimes webpages failing to load at all.

The system has two internet lines.

One is which is the default gateway of the Server,

the users are all using the other internet line which is

I have tried forwarding the DNS to Google and open DNS and the issues still persist.
Optima SystemsNetwork EngineerAsked:
Who is Participating?

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

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.

Zephyr ICTCloud ArchitectCommented:
Do you mean the this server has 2 Internet lines? Or how do we need to imagine your network, can you clarify a little?

Does the server function as a kind of router? Which could be a reason that causes issues like you're seeing ... Or???
Optima SystemsNetwork EngineerAuthor Commented:

Thanks for the comment!

Sorry heres some clarification.

The server is the DHCP server, DHCP is turned off on both routers,

the routers are both plugged into the same switchboard as the server. they all have static IP's
Router BT line: (servers default gateway)
Router Plusnet: (users default gateway)

Please let me know if you need any additional information.

Thank you for your help so far!
Zephyr ICTCloud ArchitectCommented:
Ok, that makes more sense now, thanks ...

Does the server only have the 1 gateway? Probably but just want to make sure it doesn't have 2 gateways...

If you perform nslookup from a client, it obviously will use the DHCP server/DC as the DNS server, do you always get a reply if you perform lookups? For example you perform a lookup of www.cisco.com, does it reply right away, does it give time outs, what if you try a few times?

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
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.