Originally posted by: SystemAdmin

Hi, here's my story:

I'm running application upon AIXv5.3 with hostname 'serverA', and the app listens certain ports waiting for clients coming in, like 48009, 48100 etc, so I must make sure the ports are opened, then I tried to connect to every port one by one with command tn:

#tn serverA 48100

unfortunately the result shows only port 48009 is open. The app is keeping running, and I checked the file /etc/services, in which every port I need has been decleared.

So, any clue? Thanks in advanced

Originally posted by: MarkTaylor

stupid question, but what app is listening on that port ? and have you actually started the app ? if you have and it is not listening on that port then you need to config the app to do so ..

So, on localhost do the following:

netstat -Aan | grep -i list ## will show all ports that are listening
netstat -Aan | grep <your port number> ## will see what is open on that port

If you see your app listening, then

tn 0 <port number>

If this all works, then you must be telnetting from another host and there is a firewall in the way.

Rgds
Mark Taylor