On Thu, Oct 17, 2002 at 11:09:58AM -0400, William Mahler wrote:
> 
> Greetings.
> I have a Red Hat 6.2 Mail server. The pop service is shutting it self down. The 
>message says "pop-3/Tcpp server failing ( looping or being flooded) service 
>terminated for 10 minutes. Now as most of you can imagine... My phone rings off the 
>hook when this happens...
> 
> I cannot find anything anywhere that tells me why? Can anyone help? 
> 
> Bill
Hi Bill how are things in one of the better parts of New York?
(By the way, try to wrap your text at 72 chars per line, not all
email displays can handle the long lines. Thanks)

Your problem has happened before.  Google See's all, Tell's all.
>From :
http://web.gnu.walfield.org/mail-archive/linux-net/2000-July/0344.html

==========================================================================
Subject: Re: pop 3 error
From: Brian ([EMAIL PROTECTED])
Date: Wed Jul 19 2000 - 23:05:57 EST
On Wed, 19 Jul 2000, C.M. Wong wrote:
> Hi All,
>
> Lately, I have been encountering some prob with my pop service. I get the
> below error on /var/log/message:
>
> inetd[18313]: pop-3/tcp server failing (looping or being flooded), s
> ervice terminated for 10 min

The error says it all: it's spawning processes faster than the threshold
allows and closes service for 10 minutes (and yes, it will come back if you
let
it sit there for awhile).

>From the man page ("man 5 inetd.conf"):
The optional ``max'' suffix (separated from ``wait'' or ``nowait'' by a dot)
specifies the maximum number of server instances that may be spawned from
inetd within an interval of 60 seconds. When omitted, ``max'' defaults to 40.

The 40 connections/minute acts as an emergency brake to limit the damage a
DoS'd service can do. However, if you run a busy mail server, it is possible
to
exceed 40 connections/minute of legitimate traffic. If you see this warning
in normal operation, up the limit. In inetd.conf, look for this line:
pop-3 stream tcp nowait root

change nowait to nowait.## such as:
pop-3 stream tcp nowait.80 root
==========================================================================



-- 
Jeff Kinz, Director, Emergent Research,  Hudson, MA.  "[EMAIL PROTECTED]" 
"[EMAIL PROTECTED]" copyright 2002.  Use is restricted. Any use is an 
acceptance of the offer at http://users.rcn.com/jkinz/policy.html.

    (o-                                    -o)
    //\         eLviintuaxbilse            /\\
    V_/_                                  _\_V   



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