thanks for your reply and sorry, if I had been too unspecific.
my problem was, even though I had opened the port, www.yougetsignal.com
would show it as not be accessible.
I have now the issue resolved - the port had been associated with a java-based game, and java had been blocked for all ports. so I allowed java for the same port and www.yougetsignal.com
could access it.
this was my first experience with port forwarding and I had expected that a port would be open for a telnet or www.yougetsignal.com
request no matter what the application is written in.