What is correct way to test open ports?
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Hello,
Who do you trust when do open ports testing?
I test 3 ports 80, 443 and 32400 (forwarded) with https://www.yougetsignal.com/tools/open-ports/ (from remote machine) and with Diagnostics/Test Port and getting =>
https://www.yougetsignal.com/tools/open-ports/
80 closed
443 closed
32400 openDiagnostics/Test Port
80 open
443 closed
32400 closed???
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you should always test ports from wherever location you wish it to be open or closed.
so basically:
from lan: port80 will be open by default
from externam: port80 will be closed/filtered by default
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Who do you trust when do open ports testing?
There is one.
The most famous one actually - for years if not decades.
https://www.grc.com/x/ne.dll?bh0bkyd2
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I just use canseeme.org for single port tests..
As some sort of scan to my own box.. I know what is open.. I can see what is listening. Why would I need to do a full port scan? But sure I have used grc.com before to show a point. But if I needed to do it would just run nmap off a server have on the internet (multiple vps all over the place)
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Who do you trust when do open ports testing?
There is one.
The most famous one actually - for years if not decades.
https://www.grc.com/x/ne.dll?bh0bkyd2GRC port scan is good but take their other scans with a pinch of salt.
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GRC also allows you to choose which port to scan as well.
