make cx_Oracle bind to a specific I P address or network interface?

Hi all,

Is there a way to make sure that cx_Oracle uses a specific network
interface or IP address for its connections to Oracle server? This
would be something comparable to "ssh -b BIND_ADDRESS".

The reason I need this is because I'm using a split VPN tunnel to
connect to a client's Oracle server, and I get errors when I tried
to connect using the non-VPN network interface. Because I'm mostly
developing and testing as a non-privileged user, adding a route that
forces the client server connections to a specific interface isn't ideal.

I thought this might be an Oracle client library reponsibility, and
looked through the Oracle 11g environment variables in the documentation, 
however I don't see anything relevant: 
https://docs.oracle.com/cd/E11882_01/server.112/e10839/admin_ora.htm#UNXAR116

Any suggestions on how to make cx_Oracle use a specific interface?

Thanks,
Dan


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