DNS leak in Xubuntu 17.04
Bug #1685391 reported by
GammaPoint
This bug report is a duplicate of:
Bug #1754671: Full-tunnel VPN DNS leakage regression.
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This bug affects 3 people
Affects | Status | Importance | Assigned to | Milestone | |
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openvpn (Ubuntu) |
Incomplete
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Undecided
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Unassigned |
Bug Description
I recently installed Xubuntu 17.04 and am seeing DNS leaks after connecting with my VPN (as seen from www.dnsleaktest.com and similar sites). A couple weeks ago, on 16.04 and 16.10, I had similar issues, but they were fixed with an update to dnsmasq (see https:/
I've included my /var/log/syslog, which I hope provides some useful information. Happy to give whatever else is needed.
I see the DNS leaks both when connecting through network-manager (my normal way) as well as using openvpn from the commandline.
tags: | added: zesty |
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Hi GammaPoint,
thank you for your report bing split from the already complex old report.
Lets try to get into your issue.
I think I understand that you set up your vpn and resolv in a way that you expect any DNS info to be handled "there" inside your VPN but you now see DNS requests being made out-of-band to that - which means "from your computer to the remote DNS" instead of "from your computer to something in your VPN and from there to the DNS". - That is my understanding of a DNS leak, please confirm or correct.
Could you outline your setup about:
- how the DNS in the VPN is configured to cache/forward
- local resolver configuration /etc/resolvconf/* and /etc/resolv.conf
- any further local dns configuration (dnsmasq, named, whatever you have active)
- I think a "dig +trace <somedomain>" could be useful as well, IIRC we should see there which dns your system is asking.
- If the latter is a local dnsmasq or such try to check who its config is set to forward the request to