Using the same IP address for a VIP and a SNAT - yay or nay?

OK, the extra information you've provided mostly indicates that sharing the address is not the cause of your issue, however, let me respond to a few things;

 

 

1) The originating segment doesn't matter; if the SNAT IP consumes port 16000 for an outbound translation that port cannot be used to serve a different inbound connection to the same IP address. Port 16000 for that IP address has already been used, how, why or where is not relevant.

 

2) Apologies but I missed the fact the inbound VS was NOT wildcard and was getting confused with the outbound one.

 

3) Regarding the Linux OS, this is a red herring. Any settings found there are for the HMS and management functions and interface. LTM/TMM does not use these settings; it has multiple protocol stacks that operate independently of the HMS. So yes, it's possible a lower port number could be used for an SNAT and that setting is completely ignored for anything other than management related traffic.