[Bug 1665394] Re: DNS resolution of irc.freenode.net or chat.freenode.net fails
*** This bug is a duplicate of bug 1731522 *** https://bugs.launchpad.net/bugs/1731522 ** This bug has been marked a duplicate of bug 1731522 systemd-resolved does not listen on TCP port, cannot serve large records (Cannot ping pod51041.outlook.com but can dig.) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1665394 Title: DNS resolution of irc.freenode.net or chat.freenode.net fails To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1665394/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1665394] Re: DNS resolution of irc.freenode.net or chat.freenode.net fails
It is likely to be an upstream problem. Given a zone with A/ records with enough addresses, I can reproduce the problem. Hacking in systemd source code, I could find those STR: - disable "resolve" in nsswitch.conf - add a resolution against a record with a lot of addresses in src/libsystemd/sd-resolve/test-resolve.c - build test-resolve tool - run ./test-resolve e.g.: > r = sd_resolve_getaddrinfo(resolve, , "test.neteffmon.eu", NULL, , > getaddrinfo_handler, NULL); Running this results in: > Assertion '*length <= maxlength' failed at > src/libsystemd/sd-resolve/sd-resolve.c:203, function serialize_addrinfo(). > Aborting. Changing BUFSIZE in src/libsystemd/sd-resolve/sd-resolve.c to something bigger (e.g. 65536U), rebuild and restart ./test-resolve, the resolution succeeds. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1665394 Title: DNS resolution of irc.freenode.net or chat.freenode.net fails To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1665394/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1665394] Re: DNS resolution of irc.freenode.net or chat.freenode.net fails
So, comment #5 is somehow invalid, I got the whole story on why it started to work again: Schiggn (comment #4) contacted some Freenode staff, and they changed the DNS records to expose less addresses. This indeed proved to workaround the issue. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1665394 Title: DNS resolution of irc.freenode.net or chat.freenode.net fails To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1665394/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1665394] Re: DNS resolution of irc.freenode.net or chat.freenode.net fails
Adding back "[NOTFOUND=return] resolve" to /etc/nsswitch.conf, setting DNSSEC=no in /etc/systemd/resolved.conf, restarting systemd-resolved process and then: > $ getent ahosts irc.freenode.net Gives proper list of hosts Commenting again the DNSSEC line of resolved.conf, restarting the service, and the resolution is still working. I'm a bit puzzled. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1665394 Title: DNS resolution of irc.freenode.net or chat.freenode.net fails To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1665394/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1665394] Re: DNS resolution of irc.freenode.net or chat.freenode.net fails
iputils/ping was wrong. On machines with this bug a "getent hosts chat.freenode.net" results in no output! Perhaps we have to look at getaddrinfo()! Thanks to the french ubuntu-channel #ubuntu-fr for this hint :) ** No longer affects: iputils (Ubuntu) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1665394 Title: DNS resolution of irc.freenode.net or chat.freenode.net fails To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1665394/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1665394] Re: DNS resolution of irc.freenode.net or chat.freenode.net fails
Perhaps this is an issue in iputils/ping if the response is to big. You can try this with normal ping command too. ping c1 chat.freeenode.net results in a "ping: chat.freenode.net: Temporary failure in name resolution" Using expicit -4 or -6 does work instead. Workaround as mentioned above: switch "resolve [!UNAVAIL=return]" to "resolve [UNAVAIL=return]" or place "resolve [!UNAVAIL=return]" after "dns". ** Also affects: iputils (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1665394 Title: DNS resolution of irc.freenode.net or chat.freenode.net fails To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/iputils/+bug/1665394/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1665394] Re: DNS resolution of irc.freenode.net or chat.freenode.net fails
A workaround is to remove "[NOTFOUND=return] resolve" from /etc/nsswitch.conf, though it may break other things (but nothing visible so far). -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1665394 Title: DNS resolution of irc.freenode.net or chat.freenode.net fails To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1665394/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1665394] Re: DNS resolution of irc.freenode.net or chat.freenode.net fails
Status changed to 'Confirmed' because the bug affects multiple users. ** Changed in: systemd (Ubuntu) Status: New => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1665394 Title: DNS resolution of irc.freenode.net or chat.freenode.net fails To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1665394/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
