How do I check what ports are open/closed on my computer

gallagc8

Hey,
Just a quick question. Can anyone tell me where I go to check which ports on my computer are open/closed? Specifically the ones my web browser would use.

cheers

Thomas_S_Hunterson

Your web browser will not need any ports opened.

If you are hosting a website, you'll have port 80 open, but if you are just surfing the web, none.

quazzy

Check out this site.

https://www.grc.com/x/ne.dll?bh0bkyd2

It give you a run-down of possible security issues.

Enjoy

Q

mickoneill30

Three ways.

netstat -an will show you what ports are established and listening on your PC. However, that doesn't mean they're all accessible from the internet. You may have a firewall in front of your PC or a NAT router to block access to those ports.

To check what ports are open to the internet go to
http://www.grc.com/default.htm and click the ShieldsUp link. This will scan your public IP from the internet and will let you know what ports it's able to scan from their end.

The third way is to get a port scanner (http://insecure.org/nmap/) and scan your PC / Server from your internal network and the internet.

michaelanthony

gallagc8 wrote:

Hey,
Just a quick question. Can anyone tell me where I go to check which ports on my computer are open/closed? Specifically the ones my web browser would use.

cheers

The answer to your question is to run the netstat command from the command prompt.

irlrobins

Moving to net/comms. Although it seems OP has his answer.