OT: Sendmail : # of mails per TCP connection

[Denis Beauchemin]

Randal, Phil a écrit :
> I was looking at this in the weekend and am still puzzled as to suitable
> values for ClientRate and ClientConn.  Any hints?
>
> Phil
>
> -----Original Message-----
> From: mailscanner-bounces at lists.mailscanner.info
> [mailto:mailscanner-bounces at lists.mailscanner.info] On Behalf Of Steve
> Freegard
> Sent: Monday, January 29, 2007 6:26 PM
> To: MailScanner discussion
> Subject: Re: OT: Sendmail : # of mails per TCP connection
>
> Hi Hakan,
>
> Hakan VELIOGLU wrote:
>   
>> Hi,
>>
>> I upgrade my sistem to Red Hat 4 + Sendmail 8.13 +
>>     
> MailScanner-4.57.6-1 
>   
>> ( RPM
>> install). I want to use greet_pause option.
>>
>> My MTA will wait a few seconds before greeting but after that a
>>     
> spammer 
>   
>> could
>> send lots of mails. For this reason, I am looking for a way of
>>     
> limiting the
>   
>> number of mails accepted per connection. I have searched the 
>> www.sendmail.org
>> but couldn't find anything useful. Is there a way for doing this.
>> Thanx.
>>     
>
> Sure - see http://www.technoids.org/dossed.html for a good explanation 
> of what you can do and how to do it.
>
> Cheers,
> Steve.
>   
I use the following values:
# default
ClientRate:                  5
# loopback
ClientRate:127.0.0.1         0
# my network
ClientRate:132.210          10
# about 10 internal/external hosts specified by IP address range from 10 
to 300 with most values equal to 10

# default
ClientConn:                  2
# loopback
ClientConn:127.0.0.1         0
# my network
ClientConn:132.210           5
# about 10 internal/external hosts specified by IP address range from 4 
to 25 with most values around 4-5

Look daily at your LogWatch output to spot hosts that go over your 
limits and decide if you want to give them some slack or not.

Denis

-- 
   _
  °v°   Denis Beauchemin, analyste
 /(_)\  Université de Sherbrooke, S.T.I.
  ^ ^   T: 819.821.8000x62252 F: 819.821.8045


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