If you put localhost in your application, your system (Windows or Linux)
will do a DNS lookup and return the 127.0.0.1 IP - if you put the IP
directly it saves this call.
Check your postgresql.conf file, and look for the listen_interfaces
directive - check it's set to listen_interfaces=*, and not
listen_interfaces=127.0.0.1. This will bind it to any available network
adapter on your system. Then reload PGSQL and try connecting on 10.0.0.205
again.
Andy