Re: [exim] Exim server behind NAT router (and HELO)

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Προς: Brian Candler
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Αντικείμενο: Re: [exim] Exim server behind NAT router (and HELO)
[ On Friday, March 25, 2005 at 09:24:51 (+0000), Brian Candler wrote: ]
> Subject: Re: [exim] Exim server behind NAT router (and HELO)
>
> The logic is flawed.


I'm afraid not. It's very simple and obviously not flawed, if you cared
to think abut it instead of just blindly railing against it.

> If you run a webserver which has 10,000 virtual domains
> (a common configuration), you do generally do not put 10,000 PTR records for
> that IP address. It would be madness to do so.


No, indeed you do not.

You use 10,000 CNAMEs, one for each virtual domain, all pointing at the
one canonical hostname for the web server, which thus has one
corresponding PTR.

K.I.S.S.

What kind of idiot would use A records for virtual domains anyway? Any
silly fool that does will have one hell of a time changing the IP of
that server! :-)

But then again we're not talking about HTTP anywhere here, are we.

Why does a web server need a PTR in the first place? It doesn't make
outbound connections like an SMTP host does.

-- 
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