[Bug 1305156] Re: update.d/dnscache creates resolver loop

[Thomas Hood]

Probably not a bug, but if there turns out to be a bug then it is in the
djbdns package.

** Package changed: resolvconf (Ubuntu) => djbdns (Ubuntu)

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https://bugs.launchpad.net/bugs/1305156

Title:
  update.d/dnscache creates resolver loop

Status in “djbdns” package in Ubuntu:
  Incomplete

Bug description:
  I have a forwardonly dnscache (from dbdns) set up on my system, with a
  forwarding address set up to our campus resolver.

  My system has a static IP configuration and in my
  /etc/network/interfaces, I specify "dns-nameservers 192.17.80.184"
  (local IP address) to have the DNS queries go through the DNS cache.
  When ifup runs, however, the dnscache script updates
  /etc/dnscache/root/servers/@ to point to 192.17.80.184, i.e., the
  address of the DNS cache itself. After this, any queries to the
  dnscache get stuck in an infinite loop as it forwards them to itself.

  I could change /etc/network/interfaces to specify the campus resolver
  in there, but this would cause the update.d/libc script to point
  /etc/resolv.conf to the campus resolver, and not my local dnscache,
  which defeats the point of the dnscache.

  System info:
  Description:	Ubuntu Trusty Tahr (development branch)
  Release:	14.04

  resolvconf:
    Installed: 1.69ubuntu1
    Candidate: 1.69ubuntu1
    Version table:
   *** 1.69ubuntu1 0
          500 http://us.archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages
          100 /var/lib/dpkg/status

  dbndns:
    Installed: 1:1.05-8ubuntu1
    Candidate: 1:1.05-8ubuntu1
    Version table:
   *** 1:1.05-8ubuntu1 0
          500 http://us.archive.ubuntu.com/ubuntu/ trusty/universe amd64 Packages
          100 /var/lib/dpkg/status

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