RE: Controlling ports used by DDM

["Sims, Ken" <KSIMS@xxxxxxxxxxxxxxxx>]

Hi Rob -

>But the darn thing will vary!  10516, 10530, etc.  My 
>thought is to only open up 10500 through 10599.  The 
>Cisco kid can do this but he wondered if it also uses 
>a different port to initialize the conversation.  I've 
>heard of this happening for ftp or telnet, like use port 
>xxx to start the comm then use port yyy for the actual 
>work.  I am not sure that DDM uses any of these initiator 
>ports.

There are two ports involved: the source port and the target port.  The
source port can vary, the target port should not.  Fortunately, the target
port is the one that needs to be open in the router.  According to the
service table on my AS/400, DDM without SSL is 447, DDM with SSL is 448.

Run your UPDDTA and run NETSTAT *CNN from another session.  In NETSTAT find
the session where the UPDDTA is running.  Use F14 to show ports by number
rather than name.  The local port should match the changing numbers that you
are seeing in the joblog.  The remote port should stay the same each time
and will persumably be 447 or 448.

Have the Cisco kid open up just remote port(s) that you need.

Ken
Southern Wine and Spirits of Nevada, Inc.
Opinions expressed are my own and do not necessarily represent the views of
my employer or anyone in their right mind.

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