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Twice now I have had problems connecting to my university's website. All other sites work fine and http://downforeveryoneorjustme.com reports that it's up.

I have tried multiple browsers and pinging the site returns 'Name or service not known'. I think that this is somehow a local DNS resolution problem but I don't know why it's occurring.

FWIW, this time it occurred right after I connected to my VPN which is hosted on that URL.

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  • what happens when you run nslookup @8.8.8.8 WEBSITEHERE but with the website you are actually trying to get to?
    – Thomas Ward ♦
    Nov 14, 2017 at 21:29
  • nslookup: couldn't get address for 'www.northwestern.edu': not found. Just running nslookup www.northwestern.edu returns ** server can't find www.northwestern.edu: SERVFAIL
    – Jeremy
    Nov 15, 2017 at 14:07
  • FWIW, after restarting it works again so something is getting reset during a restart.
    – Jeremy
    Nov 15, 2017 at 15:49
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    there is a known issue with OpenVPN and NetworkManager/Netplan/resolved/dnsmasq that makes DNS not work properly. I worked around this by rolling my own recursive resolver on my laptop for non-local addresses. Which is a very evil approach but 'works'. This bug has been around since 16.04 but has no resolution as of yet.
    – Thomas Ward ♦
    Nov 15, 2017 at 16:52

1 Answer 1

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It seems the system keeps the old local domain from the VPN connection in the file /run/resolvconf/resolv.conf without deleting it after leaving. I solved it by editing it manually: sudo gedit /run/resolvconf/resolv.conf, after the "search" command remove the now external local network.

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