No UDP? - was Re: [Fedora-xen] Re: easy way to configure domU

[Hope Dundas]

Hi Bill, thanks for writing back. :)

My odd problem seems to be that I can get nearly everything working on the 
new, cloned box except for DNS. And in particular, DNS over UDP - I can 
use dig +tcp to force resolution over TCP, but it otherwise just hangs 
thusly:

; <<>> DiG 9.3.3rc2 <<>> @x.x.x.x domain.com
; (1 server found)
;; global options:  printcmd
;; connection timed out; no servers could be reached
[root at hsg-vdev ~]#

nslookup behaves the same way. Has anyone else seen this? This is the 
second clone I've taken of the original box (which has never had any 
issues with DNS). I'm doing a lot of looking via google, and have seen 
many references to bad udp checksums, but when I run tcpdump -nvvi eth0 
port 53 it shows the checksums as OK.

Aside:
Because we're using full virtualization (RHEL5, x86_64), the console isn't 
available by default (needs to be conf'd in grub.conf prior to boot), I 
wasn't able to access it that way, and so the first boot was to normal 
runlevel - I couldn't figure out how to make the freshly-created machine 
boot to single user.

I did stop the source machine before doing the dd of it, and got a 
randomly generated uuid and MAC address.

If anyone has seen this behavior before and knows of a fix, please let me 
know.

Many thanks,

 	Hope Dundas



> | Hope Dundas, hope.dundas at umich.edu
> | Database/Systems Administrator
> | Housing Information Technology Office
> | University of Michigan