Pidgin dns query issues (xmpp)

[Allan Clark]

On 10/15/07, Lantern <michaelford85 at gmail.com> wrote:
>
> I've been having an issue with dns resolution in pidgin. I've got an isolated
> LAN with three RHEL5 boxes. They have the following ip addresses and
> functions:
>
> 10.52.0.34: dns server (BIND9), mysql database, pidgin client
> 10.52.0.35: pidgin client, openfire jabber server
> 10.52.0.36: pidgin client
>
> On 34, I've set "example.com" to resolve to 10.52.0.34, and I've set the dns
> server on all three boxes to be 34 as well. Pinging "example.com" returns 34
> on each box, and a small c program I've written resolves example.com to be
> 34 via the getaddrinfo function. However, I am having the following issue
> with pidgin:
>
> When I register a user with the domain "example.com," the process is
> successful, and when I view active sessions in openfire, the user shows up
> on the list. However, when I register 2 users on 2 different machines, and
> then I try to send chat messages between them via the "example.com" domain,
> the messages are not received either way. Furthermore, when I try to add the
> other as a buddy via the "example.com" domain, the authorization process is
> never shown to take place on the other end.
>
> Both message sending and buddy-adding is successful when I specify the
> actual ip address 10.52.0.34 as the domain.
>
> I've been looking through \pidgin-2.1.0\libpurple\dnsquery.{c, h} in order
> to see how the dns query works, but nothing stands out to me as code that
> would prevent proper dns resolution only for sending messages. Is anyone
> familiar with this problem, and can anyone advise me on my issue?

Does this command give you any information that gives you ideas?

              tcpdump udp port 53

Allan