Expert Advice

N3T_FTPS_InvalidSeq  
Situation Description
Suggested Actions
Situation Description

FTP session ended due to the receipt of an invalid sequence by the server

 

Suggested Actions

The FTP server received an invalid sequence from a client. Check the FTP Sessions workspace and look for other sessions that were ended because of a sequence error:

((Session End Reason = 4) & (FTP Type = Server))

If the client always has the same IP address and port, there might be a problem with the client.

If the server is ending all or most sessions with this reason code, there might be a problem with the server or the system the server is running on.

If FTP server activity logging is enabled, the SYSLOGD file on the server system might contain trace entries related to the failure. The value displayed for Server Logging Session ID may be used to locate entries in the SYSLOGD file for the failed session. The trace entries are identified by message IDs. The documentation for the messages may provide additional assistance to diagnose the problem.

This warning situation is based on the session end reason code provided when a session ends. By default, this situation is evaluated every 15 minutes and is not run at startup.

Note: For z/OS v1.8 or higher only.

 

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