Looking again. the loop probably involves systemd-resolverd too, dnsmasq
forwards to 127.0.0.53 which is systemd-resolverd, and systemd-resolverd
then returns it to dnsmasq at 127.0.0.1


Why, oh why is Ubuntu running both?


Cheers,

Simon.


On 14/03/17 11:15, Paul wrote:
> I have cpulimit(1) watching dnsmasq now, so it only goes berserk for a
> second before being killed, but the attached syslog extract captures the
> moments before and during the DNS storm. These particular lookups are
> mostly originated by Transmission, but previously the storms have
> happened when there were no Transmission processes running, with queries
> from Firefox or perhaps some unidentified Gnome weather applet.
> 
> ** Attachment added: "syslog_dns_storm.txt"
>    
> https://bugs.launchpad.net/ubuntu/+source/dnsmasq/+bug/1672099/+attachment/4837521/+files/syslog_dns_storm.txt
>

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https://bugs.launchpad.net/bugs/1672099

Title:
  DNS loop, >5,000 queries per second for minutes at a time

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