[Mimedefang] OT: sendmail limit connections

-ray ray at ops.selu.edu
Fri Feb 25 17:43:15 EST 2005


On Fri, 25 Feb 2005, Matthew S. Cramer wrote:

> I implemented months ago and slowly increased the pause up to
> 1250 ms.  I wanted to avoid any false positives (I have had none) and
> found that any further increase in the pause doesn't substantially
> increase the amount of rejections.
>
> We hit about 125,000-150,000 rejections due to the pause, per month.

I upgraded sendmail last night and started with a greet_pause of 5 
seconds.  I think a legit mailserver can wait 5 seconds for the 
220...sometimes dns takes longer than that!  The biggest pain is my access 
map is in LDAP so i had to remember howto create ldap objects, haha.

I also added ConnControl limit of 15.  I don't think there's a legit 
reason for any one host to open more than 15 tcp connections.  Comments?

ray
-- 
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Ray DeJean  				       	 http://www.r-a-y.org
Systems Engineer                    Southeastern Louisiana University
IBM Certified Specialist  	      AIX Administration, AIX Support
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