RE: [cobalt-users] New Virtual Site

[Rodolfo Paiz <rpaiz@xxxxxxxxxxxxxx>]

> For those of us who may ummmmmm have *accidently*  created
> PTR records for ALL virtual sites, is it ok to delete them
> all except for one?  I saw in another email that the PTR
> record is for the 'first site on the box'.  I'm not sure
> which site that is for me.  Do I need to look up dates or
> can I just delete the records I don't need?

It's perfectly OK to delete them. What I was taught to do in the ISP
business was to give names to all my IP addresses based on my *main*
domain, and reverse DNS all of them. So, for the Guatemalan ISP
guate.net, we did...

    IP               NAME           PTR
    ==               ====           ===

200.12.41.1    ip-41-1.guate.net    yes
200.12.41.2    ip-41-2.guate.net    yes
200.12.41.3    ip-41-3.guate.net    yes
200.12.41.4    ip-41-4.guate.net    yes

Then I can add virtual sites to my heart's content and never worry about
PTR records ever again. But you should have exactly one (one and only
one) PTR record per A record. My sendmail 8.11.0, for example, refuses
to relay any messages sent from IP's for which it cannot find a PTR.

--
Rodolfo J. Paiz
rpaiz@xxxxxxxxxxxxxx <mailto:rpaiz@xxxxxxxxxxxxxx>