Controlling the FTP server traces with MODIFY operator command

To start the general trace for the FTP server for all user IDs during initialization, specify the TRACE parameter either as a start option in the FTP server start procedure, or code a DEBUG BAS statement in FTP.DATA.

After initialization, use the MODIFY operator command to control the general and extended tracing for the FTP server. The command supports the following parameters:

DEBUG for general tracing
DUMP for extended tracing

Each allows a filter to be specified so that the traces are active for certain clients that log in. The filtering can be done by either IP address of the client or by user ID for the session.

Guideline: The jobname is the name associated with the FTP daemon background job. It is documented in message EZYFT41I in SYSLOGD. If you started the z/OS UNIX server using a procedure named FTPD, the job name to use for the MODIFY operator command is probably FTPD1. As client sessions connect to the FTP server, the session process adopts the trace options currently active. These options remain in effect for the life of the client session process, regardless of subsequent MODIFY operator commands issued to the FTP daemon.