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Open a Port on Ubuntu 20.04 - Step by step guide ?
This article covers how to open ports on Ubuntu with some examples like opening port 22, port 80, port 443, and port 53 using the ufw command.
To Open port for a specific webserver such as Apache or Nginx execute the bellow Linux command:
$ sudo ufw allow in "Apache Full"
$ sudo ufw allow in "Nginx Full"