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Re: About many connections in SMTP [message #12812 is a reply to message #12810]

Thu, 10 May 2007 14:41

dev
Messages: 1693
Registered: September 2005
Location: Moscow

Senior Member

plz check that you do not hit any UBC limits via
/proc/user_beancounters

Thanks,
Kirill

Jos� David Bravo �lvarez wrote:
> Sorry if this mail don't concerns to OVZ, but I need to discard
> possibilities
>
> -bash-3.00# uname -a
> Linux exodo.colombiahosting.com.co 2.6.8-022stab078.14-smp #1 SMP Wed
> Jul 19 16: 13:15 MSD 2006 i686 i686 i386 GNU/Linux
>
> Im using Exim 4.60, that comes with DirectAdmin. I have
> smtp_accept_max in 130 and sometimes Im getting this error: "421 Too
> many concurrent SMTP connections; please try again later."
>
> I used exiwhat and netstat and I determine that yahoo servers have many
> incoming connections to my server. Triying to determine the problem I
> used an sniffer, its an example:
>
> SNIFFER OUTOUT
> 250 OK
> 250 Accepted
> 354 Enter message, ending with "." on a line by itself
> 250 OK id=1HlpNN-0000Rm-7w
> QUIT
> 221 exodo.colombiahosting.com.co closing connection
> 14 FIN-WAIT-1 209.191.125.35:29978 > 66.128.49.69:smtp
> 14 TIME-WAIT 209.191.125.35:29978 > 66.128.49.69:smtp
> 14 RESET 209.191.125.35:29978 > 66.128.49.69:smtp
>
>
> -bash-3.00# netstat -an | grep 209.191.125.35
> tcp 0 0 66.128.49.69:25
> 209.191.125.35:27139 ESTABLISHED
> tcp 0 0 66.128.49.69:25
> 209.191.125.35:39853 ESTABLISHED
>
>
> -bash-3.00# exiwhat | grep 209.191.125.35
> 7549 handling incoming connection from web38404.mail.mud.yahoo.com
> [209.191.125.35] id=1Hlow6-0001xl-It
> 23792 handling incoming connection from web38404.mail.mud.yahoo.com
> [209.191.125.35] id=1HloZ6-0006Bk-UK
>
>
> and 20 minutes later I do netstat again and I get the same info. Then
> the connections never close
> -bash-3.00# netstat -an | grep 209.191.125.35
> tcp 0 0 66.128.49.69:25
> 209.191.125.35:27139 ESTABLISHED
> tcp 0 0 66.128.49.69:25
> 209.191.125.35:39853 ESTABLISHED
>
> I upgraded to exim 4.66 and I get the same problem.
>
>
> I'll really thanks if you can help me!
>

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[Message index]

		About many connections in SMTP By: jbravo on Thu, 10 May 2007 14:35
		Re: About many connections in SMTP By: dev on Thu, 10 May 2007 14:41
		Re: About many connections in SMTP By: rkagan on Fri, 11 May 2007 10:31

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