[Samba] Reverse DNS question

[Eero Volotinen]

This is not samba related questions.
You can speed up reverse dns adding ip and machine name
to /etc/hosts -file

--
Eero


----- Original Message -----
From: "Christian Cryder" <christianc at granitepeaks.com>
To: "Samba" <samba at lists.samba.org>
Sent: Wednesday, March 27, 2002 11:02 PM
Subject: [Samba] Reverse DNS question


> Hi folks!
>
> Ok, I'm at my wits end here and I'm hoping someone can give me some
pointers
> in the right direction. I am running RedHat 7.2 as a PDC (Samba 2.2.1a),
> with Postfix for my SMTP server, and UW's Imap server for POP. I'm not
> running a DNS server on this machine (DNS services come from our upstream
> ISP). Here's what I'm observing:
>
> 1. From the local network...When I try to SSH into the linux box, connect
> via POP, send mail, or log into the domain, it frequently takes up at
least
> 30 seconds to establish a connection.
>
> 2. From the outside world...When I try to SSH into the linux box, connect
> via POP, or send mail, its a snap (just a few seconds at most) to connect
to
> the box.
>
> It almost seems as if something on the box is trying to do reverse dns
> lookups on private IPs. I've been searching in vain to try and figure out
> what controls this and how to either
> a) configure it to not do reverse dns on private ips, or
> b) turn off reverse dns altogether.
>
> I've searched all the specific application conf files for Postfix, Samba,
> SSH, etc, and can't find anything. The fact that this slowness is
affecting
> all of these programs seems to suggest that the problem is occurring at
some
> lower level that they all use. Unfortunately, I'm at a loss as to where to
> look next.
>
> On a similarly configured box, where the only difference is that Samba is
> not acting as a domain controller, I don't experience any slowdowns, both
> for internal and external access. SO...does this sound like a Samba
related
> issue? Or do I need to look elsewhere (if so, where).
>
> tia,
> Christian
> ----------------------------------------------
> Christian Cryder [christianc at atmreports.com]
> Internet Architect, ATMReports.com
> Barracuda - http://barracuda.enhydra.org
> ----------------------------------------------
>  "What a great time to be a(n employed) Geek"
>
>
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