[Samba] Reverse DNS question

[Kourosh Ghassemieh]

You could set up an internal DNS server for your network, which
is what I do.  Everything inside points to that DNS server and it
forwards queries it can't answer to the ISP's DNS servers.  This
also allows it to act as a caching server to speed up resolution
for frequently accessed domains.  Your other option is to make
entries for all the machines in your network in the /etc/hosts
file of your server.

My suggestion is to set up a DNS server for your internal network.

Hope this helps.

At 02:02 PM 3/27/2002 -0700, Christian Cryder wrote:
>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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--
-----------------------------------------------------------
Kourosh Ghassemieh
MindWare Information Systems & Technologies
9255 Sunset Blvd, Penthouse
West Hollywood CA 90069
Tel: (310) 729-1784
kourosh at atlanticpearl.com