> That's a whole lotta ports to give to Firebird, don't you think. If you
> have a firewall with hundreds of machines behind it, it is likely you
> might need more than 1024 ports for other stuff, so some of 1024+ ports
> will be used. Firebird server has no clue which ports in that range are
> already 'taken' on the firewall, since it is not on the same machine.

You are right. This problem I missed.
Well... Everything is for the better: now I can insist on replication
solution. :)

SY, SD.