[Bug 994963] Re: DNS stops working after some time

[Robie Basak]

I've seen lots of issues in the past with either ISPs with non-compliant
DNS services or routers with non-compliant DNS services (including
transparent filtering/redirection). This can cause erroneous DNS
responses to end up being cached, or resolvers being marked as
unreachable.

I wonder if this is the issue here?

I would debug this sort of issue with tcpdump and wireshark, using dig
to generate DNS queries locally, using tcpdump to see what dnsmasq is
sending out after the hang, and checking all previous requests and
replies to make sure that dnsmasq is really doing something wrong.

I'm not sure how to do this without a developer having the ability to
reproduce the problem though.

I'll set the Priority of the dnsmasq task to Medium for now, but if it
turns out that a wide range of Ubuntu users are affected (ie. lots of
routers or lots of ISPs) then we may need to review this.

** Changed in: dnsmasq (Ubuntu)
   Importance: Undecided => Medium

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https://bugs.launchpad.net/bugs/994963

Title:
  DNS stops working after some time

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