Firedac TFDEventAlerter and Firebird 4.0

Question

I am trying to use the Firedac TFDEventAlerter in Delphi 10.4 to handle the events of a Firebird 4.0 database. Is that possible?

With Firebird 2.5 it all works fine, but the same code in combination with Firebird 4.0 does not respond to the post_event().

I have not tried it with Firebird 3.0. I use fbClient 4.0.1.2692

I copied the client application to the server where Firebird4.0 is running, and that works (!). Is it so that the events are using a different port? I thought, if the client can connect to the database that should be enough.

As Arioch suggested, I took a look at firebird.conf, and see the following:

# The TCP Port Number to be used for server Event Notification
# messages.The value of 0 (Zero) means that the server will choose
# a port number randomly.
#
# Per-connection configurable.
#
# Type: integer
#
#RemoteAuxPort = 0

So, I suppose, I have to choose a fixed port, and open it in the firewall.

Answer 1

As the OP posted elsewhere:

It had nothing to do with the version.
The FB4.0 was running on another server, and I had to adjust teh firewall for the port the events where sent ( configured in firebird.config )