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DNS issues once VPN connects

danwyorks — Tue, 16 Jun 2020 17:30:53 GMT

Hi All,

I'm having issues when trying to use VPN on my BT line, my company has 6 different sites I can connect to in different locations. However the moment I connect to VPN in any location I'm unable to access any web pages due to DNS lookup failure. I can still ping 8.8.8.8 (google)

Has anyone else had this over a split tunnel VPN?

Kind regards,

Danny

Re: DNS issues once VPN connects

Anonymous — Tue, 16 Jun 2020 17:49:37 GMT

Company websites tend to use secure VPNs' for obvious reasons, so I'm assuming your company have issued you with a secure VPN key/dongle? Without it, you have no chance

Re: DNS issues once VPN connects

danwyorks — Tue, 16 Jun 2020 17:56:40 GMT

Thanks for your response, we have two authentication methods depending on the VPN profile, one just uses AD creds and the other a MFA push notification to my phone. These all go through successfully and the VPN connects its only after connecting I have the DNS issue.

If i test the VPN connection over 4G using my phones internet connection to the same endpoint it connects successfully and DNS continues working.

Re: DNS issues once VPN connects

Anonymous — Tue, 16 Jun 2020 18:03:48 GMT

There was a similar sounding question on here recently but I don't know if it was resolved. I think the question was something like Do BT throttle VPN Connections if you want to search for it

Re: DNS issues once VPN connects

danwyorks — Tue, 16 Jun 2020 18:06:03 GMT

I'll take a quick look, thanks for the tip!

Re: DNS issues once VPN connects

pippincp — Tue, 16 Jun 2020 18:48:09 GMT

Have you turned off obtain DNS automatically on the device you are using and entered google DNS?