[JDEV] jabberd behind NAT fails s2s interoperation

matthew c. mead mmead at goof.com
Thu Sep 26 11:39:49 CDT 2002

On Thu, Sep 26, 2002 at 04:58:51PM +0100, Richard Dobson wrote:
> > Yeah, I found that one out by trying.  I still don't see what's
> > going wrong.
> >
> > Does dialback require that the ip address specified by the A
> > record for the server name have a PTR which points back to the
> > server name?

> No you do not need a PTR but the domain your server is claiming to be needs
> to point to the machine you are trying to use.

I have an A record for goof.com that points to a NAT box.  That
box forwards packets on the jabber ports to a box on my internal
network that runs the jabber server.

I do not have a PTR record for the ip address that points to the
canonical name "goof.com."

Given this, I can't figure out what's wrong.  Does the dialback
code pass the IP address of the interface to which it is bound to
the remote server?  If so, this could be the problem - in my
case, it would be passing the internal ip address, rather than
the external.

Thanks for helping me eliminate the worry of needing a PTR
record.  My guess is what I've described above is happening.


matthew c. mead


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