My friend have a phpbb forum and he want use the database from an external host. (from a second host server).
We can move this database to his host server but We don't want this.

If I want to use 3rd party database, how I'm going to do it?
I want to connect to the database from the other host server

Anyone know how to?
Thanks.

the host where the database is will need to open a firewall port for for access by the server where the forum is.

then your connection needs to reference the IP or DNS name of the DB server.

the host where the database is will need to open a firewall port

Thank for you reply.

This is not in my control,
How am I going to do this?

Thank you.

This is not in my control,

In that case you aren't going to do it.