pop3 timeouts

Discussion in 'Installation/Configuration' started by andron26, Feb 1, 2008.

  1. andron26

    andron26 Member

    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.
     
  2. till

    till Super Moderator Staff Member ISPConfig Developer

    And you use maildir as described in the perfect setup or mbox?
     
  3. andron26

    andron26 Member

    I use Maildir.
     
  4. falko

    falko Super Moderator ISPConfig Developer

    Any errors in your logs? What are the outputs of
    Code:
    netstat -tap
    ,
    Code:
    df -h
    and
    Code:
    repquota -avug
    ?
     
  5. andron26

    andron26 Member

    Attached output.
     

    Attached Files:

    • log.txt
      File size:
      12.3 KB
      Views:
      233
  6. andron26

    andron26 Member

    Netstat shows a lot of time_wait connections on port 110. What does this mean?
     
  7. falko

    falko Super Moderator ISPConfig Developer

    Might be some kind of DOS attack. That would explain the timeouts your users sometimes have when they try to download mails...
     
  8. andron26

    andron26 Member

    Is it possible to log detail connection between mail client and pop3 server?
     
  9. falko

    falko Super Moderator ISPConfig Developer

    It's logged in the mail log (/var/log/mail on SUSE).
     
  10. andron26

    andron26 Member

    I know but I need more detailed log. I mean full connection log between client and server (HELLO, USER, PASS, STAT etc.)
     
  11. till

    till Super Moderator Staff Member ISPConfig Developer

  12. andron26

    andron26 Member

    Thanks a lot.
     

Share This Page