Blocked Ports

[nov0798]

Does anyone know of a software application that can detect what ports are blocked and which ones are open on a router/switch?

 

[WayneW]

there are lots of port scanners around, depending upon exactly what you are looking for. Google for "port scanner"
If you are trying to evaluate your home configuration, this may help Gibson Research - Shields Up
https://www.grc.com/x/ne.dll?bh0bkyd2

 

[tmbrown97]

Hey Brian,

I have used Blue's port scanner for years... www.bluebitter.de But, if you try to run a portscan from a home DSL/Cable Modem, sometimes it'll detect your attempt and block you from receiving anything. Either way, it's simple and I still use it all the time.

-Todd