squirrelmail-users-request (AT) lists (DOT) sourceforge.net wrote:
Message: 2
Date: Mon, 8 May 2006 16:30:44 +0300 (EEST)
Subject: Re: [SM-USERS] Possible DNS problem being shown by Squirrelmail
From: "Tomas Kuliavas" <tokul (AT) users (DOT) sourceforge.net>
To: squirrelmail-users (AT) lists (DOT) sourceforge.net

>I've recently installed Squirrelmail on two virtualised (running Plesk &
>Virtuozzo) supposedly identical web servers running FC3. My problem is
>that on one server there was a delay of 5-10 seconds in displaying any
>pane in Squirrelmail. This same server was initially unable to resolve
>any external addresses and was fixed by Tech Support adding another name
>server to /etc/resolv.conf . Then it was slow to resolve external
>addresses (the same 5-10 seconds) upon doing something like "wget
>http://www.google.com", I fixed this myself by changing the DNS servers
>in /etc/resolve.cfg to be the same ones as on the trouble-free server.
>However Squirrelmail was still exhibiting the 5-10 second delay when
>opening panes. By changing the IMAP server that SM uses from
>"mail.babbnet.com" to "localhost" I was able to remove this delay.
>However I'm conscious the underlying problem is still there and I would
>like to work out what is going on. I would like to be able to do
>something on the command line to illustrate the problem to Tech Support
>(I can't just tell them SM is slow as SM is installed by myself and as
>such isn't supported by them) and would ideally like to be able to fix
>it myself without waiting for them!
>>
>Can anyone see why "mail.babbnet.com" vs. "localhost" would cause this
>delay?
>
>
>
a) localhost is resolved in /etc/hosts, mail.babbnet.com is resolved in dns.
b) connection to mail.babbnet.com goes through different interface and
some traffic (maybe tcp/113) is dropped by firewall rules.
if you are unprivileged user on server and can change globally used dns
server's without any help from tech support - change your provider.
/etc/resolv.conf is not supposed to be world writable.
Hi,
I have root access to these servers so there's no problem there! I'm
just trying to work out what I can do to illustrate this problem to tech
support, it's no use telling them how the problem manifests itself in
Squirrel Mail as they don't support this seeing as I've installed it myself.
How could I replicate the slow resolution of mail.babbnet.com on the
command line?
Thanks!
Geoff