Multi ports over Internet Connection

Dave

We have multiple services running on our work server and when I am connected to our lan I can access any service by typing the service name i.e. " Navision25". The problem we are running into is when I establish a internet connection and attempt to start the same service as above i get a tcp connection timed out error.
I modified the host & services file to read our static IP and port #.
The only service I can connect to is the service running on Navision default port 2407? The service "Navision25" is on port 2440. I can't connect over the internet to any other service other than the default service on the 2407 port. We are using a firewall and it is configured correctly.
We have for example
static IP 111.111.111.111:2440 = internal IP 222.222.222.222:2440. Anyone have any suggestions ???

db

Try check that ports used on connection with netstat utility.
Then configure firewall, keep in mind that connection to port 2440 can be made from any port:
source:<any> -> dest:2440