Subject Re: [firebird-support] Prevent Windows from using port 3050
Author Thomas Steinmaurer
Hello Reinhard,

> I use Firebird 1.5 on several Windows 2000 servers (some of then running
> MSSQL and Exchange).
> Today, after restarting a server, i could not connect to the database
> via network. I recognized that the process 'system' was using port 3050.
> After a second restart the process 'msdtc.exe' used it. These processes
> start before firebird so starting the firebird server fails because of
> the used port.
> I found out, that this processes use dynamic ports which changes on
> every reboot. So rebooting a third time resolved the problem.
> Does anybody know how to prevent Windows from using port 3050?

For a range of ports, check this out:;en-us;812873

Thomas Steinmaurer
LogManager Series - Logging/Auditing Suites supporting
InterBase, Firebird, Advantage Database, MS SQL Server and
NexusDB V2
Upscene Productions