I have a client running windows 2003 small business server who has
setup the firebird server on this machine and has clients connecting
to the machine via a delphi application.

When trying to make a TCP/IP connection to the server, the
message, "No connection could be made because the target machine
actively refused it" appears for all client machines.

This happens even when the server attempts to connect to itself as a
server. The server is able to connect using Local protocol.

Using the netstat utility, I have been able to establish that even
when the firebird server is started, there is no evidence of the
server listening on the port 3050 (gds_db). There is no entry at all
for this port.

The firebird server has been uninstalled and re-installed several
times without any change in this behaviour.

I have experienced a similar problem on Win XP Service Pack 2 which
has been able to be corrected by opening up port 3050 in the XP
firewall.

I am using version 1.5.1 of the firebird server.