Port checking?

[jeepjkdan]

Anyone know of a program that will enable me to test port forwards

As in

A server is set as the connecting computer.......

A client is set listening on all ports (within reason)

Lastly a way to see in preference real time port openings and closings...
Ie if I forward no ports then nothing happens
If I forward port 25, then port 25 will show up ASAP as being open an connection available..

Any ideas on where to start ???

Cheers

 

[Rodrick]

That really depends on your setup. (IE, what's your border device/router/firewall) Each routing device has different ways to look at logs, etc.

If you just need to see what's responding from the internet: Shields Up. This is dependent on many different factors though, not just port forwarding.

 

[teksquad]

Give nmap a try


http://nmap.org/

 

[jeepjkdan]

That really depends on your setup. (IE, what's your border device/router/firewall) Each routing device has different ways to look at logs, etc.

If you just need to see what's responding from the internet: Shields Up. This is dependent on many different factors though, not just port forwarding.

I'm trying to get away from the border device, I am looking for a program to simply connect or not connect on any or all ports I tell it.
This would enable me to test the border device or devices depending on routing. Also giving me the option for things like...
Hmm
For instance

I am listening on port 80 to 100 and can connect on port 10000 to it. Sweet it works or hmm it was ment to go to port 81, I need to fix that in ... Insert network related device here..

I will look into nmap, cheers

 

[Rodrick]

I'm still not sure I understand what you are asking for but have you tried good old fashioned telnet? Works wonders for me if I just need to see if anything is answering at the other end of x.x.x.x:y