For reasons beyond my control I have to move from DBD::ODBC Other firewall restrictions are that I can't talk to the Oracle listener, which exists on the Internal network, on port 1521.
I've solved this problem by getting the Firewall admin to set up a rule such that requests on port 64010 from the DMZ --> Internal network are redirected to the Oracle server on port 1521

Looking in the listener.log file on the Oracle server I can see that the request is arriving OK with all the correct credentials

Using some packet monitoring software I can also see the packect response from the Oracle server going back through the firewall to the correct machine on the DMZ.

Now my question is that the DBI->connect() then seems to be trying to reply on some random port in the 3XXX --> 5XXX range. Not unreasonably the FW admin is loathed to open all these ports (indeed some are already in use)

Is it possible to specify in code or configuration file which ports will be used on these subsequent transmissions?

In reply to TCP Ports used by DBD::Oracle by ColtsFoot

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