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No Internet connection away from Office

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by jeremytech76

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I am glorified Help Desk.

Problem: Users connect with no issues at work. But when they take their laptops home suddenly none of them can get an internet connection (all are set dynamically).

This appears to be some kind of DNS issue. In their VPN connections, when I change the host name to an IP instead of friendly, the VPN connects and THEN they can get on the net, so apparently this allows them to hit our DNS server. I have flushed DNS and ran ipconfig /registerdns with no results.

I'm baffled.

Recent changes have been made to the office. They are on MPLS and they were getting their interent through our office. We installed cable internet and routed the net though their own conenction and reduced the MPLS traffic to intranet traffic. No changes were made on the machines. However, we added a secondary DNS server entry into the router because for some reason at the office, they were getting served DNS from here at HQ instead of from teh ISP provider.

Any suggestions or pointing would be greatly appreciated!

2 replies

by robo_dev

In most VPN clients there's a setting such as 'default gateway is on remote network'. Their internet connections will not work unless this is enabled.

Note that most VPN clients will not allow 'split tunneling'. This would explain your DNS issue since the VPN connection is trying to defend itself against DNS hijack.

by jeremytech76

Well, I have all VPN clients set to NOT use the def. gateway on remote network.

I have found a registry entry at HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows NT\DNSClient. I found a policy on the domain pushing this. Jeez.

Thanks!

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