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* https://curlie.org/en/Computers/Security/Firewalls/ | * https://curlie.org/en/Computers/Security/Firewalls/ | ||
=== Computers/Security/Internet/Products_and_Tools/Security_Scanners === | |||
* https://curlie.org/Computers/Security/Internet/Products_and_Tools/Security_Scanners/ | |||
==== nmap ==== | |||
* https://www.lisenet.com/2013/finding-open-ports-and-listening-services-on-linux/ – lots of helpful examples how to make use of nmap | |||
e.g. can I connect to host HOST on port 3306: | |||
<pre> | |||
$ sudo nmap -P T:3306 -T4 HOST | |||
</pre> | |||
===== firewalld ===== | ===== firewalld ===== |