> This is format of jdbc url:
> jdbc:firebirdsql://localhost:3050/<path_to_database>/<database_name>.fdb

> This works fine on a LAN.
> But how about a Firebird server running on an internet server, outside the
> LAN.
> Is there an other url format in that case ?

No, you just specify the public name or IP address and port instead of
localhost:3050.

But it is not recommended to use Firebird over the Internet, since the wire
protocol is not optimized for a delays you have there. The second reason is
security - wire protocol is not encrypted. Better install either ssh tunnel
or ZeeBeeDee that will both compress and encrypt traffic, that brings
performance.

Roman