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Old 1st February 2008, 11:18
andron26 andron26 is offline
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Default pop3 timeouts

Hello,

I have ISPConfig with OpenSuse 10.2 installed by perfect setup guide. Everything worked fine for about 6 months. Now I have users which started to have timeouts when they uses pop3 e-mail clients and download messages with bigger attachments. They have to try several times before they can retrieve e-mail. When they connect to webmail they can retrieve e-mail without problem.
What could be the reason? There are a lot of hard disk space, CPU utilization is about 30%, there is enough RAM. I'have changed maxperip value in pop3d config file but nothing helped.
How can I see detailed pop3 log? Is it possible to trace connection to pop3 server? In mail log there is only who and when connected.

Thanks in advance and sorry for my english.
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  #2  
Old 1st February 2008, 11:45
till till is offline
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And you use maildir as described in the perfect setup or mbox?
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Old 1st February 2008, 11:56
andron26 andron26 is offline
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I use Maildir.
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Old 2nd February 2008, 18:53
falko falko is offline
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Any errors in your logs? What are the outputs of
Code:
netstat -tap
,
Code:
df -h
and
Code:
repquota -avug
?
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Old 4th February 2008, 08:53
andron26 andron26 is offline
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Attached output.
Attached Files
File Type: txt log.txt (12.3 KB, 221 views)
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  #6  
Old 5th February 2008, 15:04
andron26 andron26 is offline
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Netstat shows a lot of time_wait connections on port 110. What does this mean?
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Old 5th February 2008, 16:29
falko falko is offline
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Might be some kind of DOS attack. That would explain the timeouts your users sometimes have when they try to download mails...
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  #8  
Old 6th February 2008, 09:40
andron26 andron26 is offline
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Is it possible to log detail connection between mail client and pop3 server?
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Old 6th February 2008, 12:45
falko falko is offline
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It's logged in the mail log (/var/log/mail on SUSE).
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  #10  
Old 7th February 2008, 08:24
andron26 andron26 is offline
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I know but I need more detailed log. I mean full connection log between client and server (HELLO, USER, PASS, STAT etc.)
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