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DNS issue after a short period - SSL VPN

Hi,

I have a user using SSL VPN (Remote Access) to connect to the office. 

This worked good over the last months, but we're now having strange issues:

After a short ( but undefined) period of time, he's unable to access any internal web resources using DNS names.

For example, he connects and can access welcome.ihw.local, but after a moment, he's not longer able to access it using DNS, but only using its IP.

When he's having the issue, I can do nslookup and this works fine, but ping is not working. 

When he reboots his machine, both nslookup and ping are working. 

If he disconnects the VPN, and reconnects, that's not working neither.

He needs to restart his workstation to fix the issue, and then after a few minutes, it's the same scenario again.

Could you please help? 



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  • Hi Erick,
    I reviewed the complete configuration and unfortunately found nothing suspicious that could cause this issue.

    I use the same SSL VPN and it works like a charm, with absolutely 0 issue.

    I cannot use a different device for that, as it's my manager computer at home, and also I cannot try his account on my computer as he's in UK and I'm not... I compared the .ovpn file with mine, as the file is exactly the same.

    From the Sophos logs, I cannot find anything happening at that time, so I'm more and more wondering if that can be a bug in SFOS, causing this weird behavior.. 

  • Hi Thomas,

    Is it possible to create a test account(with the same config) and send it to test on your manager's computer?

    Erick Jan
    Community Support Engineer | Sophos Technical Support
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