> One thing that would help with these confusing NXDOMAIN errors in general
the vast, VAST majority of the time you see this message it is actually not a NXDOMAIN error. This is due to a Ubuntu-only patch to systemd to work around some select captive portals that are slightly broken, so in any environment outside the broken captive portals (e.g. public wifi that you have to 'click here to accept terms' before getting internet access - and note that not all captive portals are broken) if you see this NXDOMAIN "error" it is almost always just a normal lookup of a domain that doesn't exist, and the error message is simply wrong (this also slows down dns due to forcing fallback to a lower dns protocol level and retry of the already-failed lookup). To clarify specifically for this bug, the lookup of "connectivity- check.ubuntu.com.your_domain" clearly has nothing to do with any "DNS violation", and the NXDOMAIN returned by the upstream nameserver is the *correct* response - that hostname really, actually doesn't exist. network-manager could work around this problematic Ubuntu-only systemd patch, but the real problem is unquestionably that systemd should not have the Ubuntu-only patch that's causing these messages. Fixing this appropriately (i.e. so that systemd still works with the broken captive portal issue) requires access to one of the broken captive portals, so I haven't been able to work on correctly fixing this lately, but it is something I want to do, so we can get rid of the very unfortunate false NXDOMAIN "error" messages. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1880258 Title: Add trailing dot to make connectivity-check.ubuntu.com. absolute and reduce NXDOMAIN warning noise To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/1880258/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
