Public bug reported:
Install ISO: xubuntu-12.04-desktop-amd64.iso
dnsmasq-base: 2.59-4
resolvconf: 1.63ubuntu11
My first time to install 12.04, so no prior experience with
resolvconf/dnsmasq.
I used the 64-bit Xubuntu desktop CD-ROM to install to a brand-new hard
disk. The machine has a wireless interface (unused) and an ethernet
interface, which is assigned its IP address by my router via DHCP. The
generated resolv.conf (attached) points to 127.0.0.1 as the nameserver.
The nm-dns-dnsmasq.conf in turn points to the router (192.168.3.1) as
the DNS server.
The system, once installed, cannot get updates from
us.archive.ubuntu.com because of a name-resolution problem. It looks as
though any DNS query that returns a large answer (many IP addresses for
a name, e.g.), isn't handled.
cbearden@anselm:~$ host us.archive.ubuntu.com
;; Truncated, retrying in TCP mode.
Host us.archive.ubuntu.com.Belkin not found: 5(REFUSED)
cbearden@anselm:~$ host www.hal-pc.org
www.hal-pc.org has address 204.52.135.18
When the first query (UDP) is issued, the router responds with the
answer (see the attached text output of a tcpdump trace), but the system
ignores the response and queries the router via TCP, but the connection
is refused.
Changing the nameserver in /etc/resolv.conf to point to the router makes
no difference. Changing it to point directly to my ISP's DNS server
makes name resolution work.
This may be the same bug as #998712, but I'm can't tell for sure.
I'm attaching
a tar file containing
* /etc/resolv.conf
* /etc/resolvconf/*
* /run/resolvconf/
/etc/network/interfaces
/run/nm-dns-dnsmasq.conf
/var/log/syslog
and the text output of the tcpdump trace mentioned above.
I'll work around this problem manually to be able to get updates and
resolve names. Or, if I did something wrong in my setup, I'll gladly
accept instruction. :-)
** Affects: resolvconf (Ubuntu)
Importance: Undecided
Status: New
** Tags: dnsmasq resolvconf
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https://bugs.launchpad.net/bugs/999395
Title:
12.04 system unable to resolve us.archive.ubuntu.com with
resolvconf/dnsmasq
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