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Thread: imap failing

  1. #1
    omarfilip's Avatar
    omarfilip is offline Nearly a Master Glow Jedi
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    Default imap failing

    I've gotten several of these today from my dedicated server. Should I investigate more, or is there no reason for concern?

    Code:
    imap failed @ Sun Apr  4 23:17:41 2010. A restart was attempted  automagically.
    Service Check Method:  [tcp connect]
    
    Failure Reason: TCP Transaction Log:
    << * OK [CAPABILITY IMAP4rev1 UIDPLUS CHILDREN NAMESPACE  THREAD=ORDEREDSUBJECT THREAD=REFERENCES SORT QUOTA IDLE ACL ACL2=UNION  STARTTLS] Courier-IMAP ready. Copyright 1998-2008 Double Precision, Inc.   See COPYING for distribution information.
    >> A001 LOGIN __cpanel__service__auth__imap__9KzSjhNn7HO0INXnmBQCQH8LhWF1WG... jaXjwfqkxnVgCKGC
    <<
    imap: ** [ != A001 OK]

  2. #2
    sergey is offline Master Glow Jedi
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    Default

    Change the below setting in WHM > Tweak Settings to 3 (it's supposed to be a default level). Let us know if these emails persist in the same high volumes as before after the changes.

    The number of times a ChkServd TCP check must fail before notification is sent and the service is restarted. On heavily loaded systems these types of service checks fail occasionaly producing erroneous indications that services are down. A setting of 0 will disable all notifications and restarts due to TCP checks. Setting this value to 3 or higher is recommended for most systems.

  3. #3
    omarfilip's Avatar
    omarfilip is offline Nearly a Master Glow Jedi
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    Default

    It's already at 3, so I'll try 4.

  4. #4
    omarfilip's Avatar
    omarfilip is offline Nearly a Master Glow Jedi
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    Default

    Just got another one with the setting at 4. I don't recall getting this message before today.

  5. #5
    Matt's Avatar
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    Default

    We have a ticket open with cPanel about it. It seems to be some issue with a recent update. it seems to be false positives and not something that actually affects quality of service, but we are working to have them get the bug resolved.
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  6. #6
    omarfilip's Avatar
    omarfilip is offline Nearly a Master Glow Jedi
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    Default

    OK, thanks.

  7. #7
    Matt's Avatar
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    Switching to Dovecot mailserver from Courier mailserver seems to have fixed the issue on your server. Let us know if you see more of the same after this update.
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  8. #8
    omarfilip's Avatar
    omarfilip is offline Nearly a Master Glow Jedi
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    Default

    Ok, thanks for the update, I'll keep an eye on it.

    Meanwhile I've received a ton of these, or similar:

    Code:
    Time:    Mon Apr  5 21:11:39 2010 -0500
    PID:     29394
    Account: nobody
    Uptime:  360971 seconds
    
    Executable:
    
    /usr/sbin/proftpd\004bb51641\00\00\00\00\00\00\00\00 (deleted)
    
    The file system shows this process is running an executable file that  has been deleted. This typically happens when the original file has been  replaced by a new file when the application is updated. To prevent this  being reported again, restart the process that runs this excecutable  file. See csf.conf and the PT_DELETED text for more information about  the security implications of processes running deleted executable files.
    
    
    Command Line (often faked in exploits):
    
    proftpd: (accepting connections)
    
    
    Network connections by the process (if any):
    
    tcp6: 0.0.0.0:21 -> 0.0.0.0:0
    
    Files open by the process (if any):
    
    /dev/null
    
    Memory maps by the process (if any):
    ...

  9. #9
    Alexander's Avatar
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    Default

    Hi, some modifications have been added into lfd ignore file. This should resolve the issue.

  10. #10
    omarfilip's Avatar
    omarfilip is offline Nearly a Master Glow Jedi
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    Thanks, Alex.

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