Ewald,
 
I don't know the details of your trace, but this looks similar to an incident 
that occured here recently. This may be a shot in the dark, but it's worth a 
try.  Make a small change to your PROFILE TCPIP to include a parmameter called 
'OVERRIDEPRECEDENCE' under the ASSORTEDPARMS section like so:               
 
ASSORTEDPARMS                                                 
 PROXYARP RESTRICTLOWPORTS OVERRIDEPRECEDENCE                 
ENDASSORTEDPARMS                                              
 
In our client's problem, FTP started giving OPEN TIMEOUTs to z/OS FTPD IP 
addresses *only*...other FTP sessions opened just fine it seemed.  Nothing 
changed, yada yada...same thing customers always told me when I was at IBM :)  
Though, I still suspect that something in z/OS TCPIP was altered that 
indirectly affected the precidence values. E.g expecting an 'immediate', a '1' 
whatever they use. 
 
I'd be curious if this is the same issue.  Let me know.
Doug


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From: The IBM z/VM Operating System on behalf of Ewald Roller
Sent: Fri 19-Oct-07 10:53
To: [email protected]
Subject: FTP timeout on open request



On my side nothing has changed. I have no access to the AIX side so I
must ask the admin on monday.

Another curiosity: my VSE system on the same subnet (different OSA) has no
problems.

Thanks
Ewald

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