[opensuse] How to see what is blocking IP requests?

I am trying to get Firebird database server running on my computer. If I try to connect to the server in local mode (doesn't use IP at all), it works fine. If I then try to connect with IP locally using 127.0.0.1 the connection is actively refused. I do not have the openSuse firewall active. So I don't have any idea what is blocking it. This is an Xen Guest (DomU), but I am not sure that has anything to do with it. Thanks for your help. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org