Open relays and such

[Corey Edwards]

On Fri, 2007-05-18 at 10:21 -0600, Dave Smith wrote:
> Corey Edwards wrote:
> > You probably wouldn't set up a PTR record, not unless your ISP has
> > delegated DNS for your IP address to you (very uncommon). You will have
> > to ask whoever owns your address space to add the PTR record on your
> > behalf. It's really quite easy and any decent ISP will do it for you.
> >   
> 
> It seems likely that they already have. My box is a linode, but I guess 
> the linode admins don't know what I've named it, so maybe I should 
> request it of them. How can I find out if it's already done? Should 
> nslookup of the IP address give me my hostname?

Received: from thesmithfam.org (li6-49.members.linode.com
[66.160.141.49])

So your server is calling itself "thesmithfam.org", but DNS names it
"li6-49.members.linode.com", which is the default PTR entry. IIRC
there's a place in the Linode site to change the reverse DNS for your IP
address.

http://www.linode.com/forums/viewtopic.php?t=405

Corey