External port scan

Hi all

Looking for a tool/website to do an external scan of a firewall to check what port are open?

Spin up a Digital ocean droplet and use nmap.


I’ve always liked ShieldsUp for some basic port scanning.

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Also if you are using snort or suracata turn them off or the ip your scanning from will quickly get blocked.


For a quick and minimal solution you can try you get signal, it only tests TCP ports but is pretty good.