Software to find a Program's port usage?

[elkinm]

I have some old/unsupported software that works just fine when connected directly to the net but will not when connection through a router.

I would like to find what ports it is using or monitoring for connection so I can forward them to the router.

I know software firewalls can monitor connections or connection attempts, I have not seen a port by port analysis and personally I have always had more problems with software firewalls so I would like to avoid them if possible.

Thanks

 

[nweaver]

netstat (both windows and linux) can watch for connections

Ethereal might be your best bet, but trim down your running apps that might access the net, as it may be an overload of info for you to sift through if you don't know what you are looking for.

 

[Rapidskies]

netstat -nab
Can run it before you load the app and after to get an idea of what ports it is opening up.

 

[JackMDS]

http://www.nirsoft.net/utils/cports.html

:sun:

 

[elkinm]

Thanks, I will try both currports seems to give more detail but I did not know about netstat.
Will report back on my results.

 

[FreshPrince]

active ports

 

[TheSophist]

2nd on the Active Ports

 

[JackMDS]

Active Ports is a nice program, but I think that Current Ports is better.

Functionally they both provide the same info.

However when I have a choice, I always prefer a stand-alone program the is comprised of a single Exe file that does not need to be installed. These types of programs usually do not leave unnecessary Entry in the Registry, thus works faster and smoother, and can be completely uninstalled by just deleting the Exe file.

:sun:

 

[nweaver]

Originally posted by: JackMDS
Active Ports is a nice program, but I think that Current Ports is better.

Functionally they both provide the same info.

However when I have a choice, I always prefer a stand-alone program the is comprised of a single Exe file that does not need to be installed. These types of programs usually do not leave unnecessary Entry in the Registry, thus works faster and smoother, and can be completely uninstalled by just deleting the Exe file.

:sun:

and that is a fantastic attribute in a small, (mostly) single use program.

 

[FreshPrince]

if you have symantec antivirus corp edition 10, it will pick up active ports as a threat and try to remove it.

 

[elkinm]

CurrPorts worked like a charm. After all the programs were running it showed me all the ports I needed to forward and boy where there a lot of ports.

I will try Active Ports but the Sym AV corp. issue could be a problem.

Thanks everyone.

 

[Atheus]

Originally posted by: elkinm
After all the programs were running it showed me all the ports I needed to forward and boy where there a lot of ports.

Really? What program is it? You aren't forwarding all the high number ports associated with it are you? Because they are probably outgoing connections.