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 192.168.1.1 which is the default gateway of the Server,

the users are all using the other internet line which is 192.168.1.199

I have tried forwarding the DNS to Google and open DNS and the issues still persist.
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Optima SystemsNetwork EngineerAsked:
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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???
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Optima SystemsNetwork EngineerAuthor Commented:
Hi,

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
Server 192.168.1.250
Router BT line: 192.168.1.1 (servers default gateway)
Router Plusnet: 192.168.1.199 (users default gateway)

Please let me know if you need any additional information.

Thank you for your help so far!
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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?
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