how to install firewall in ubuntu

how to install firewall in ubuntu, install firewall ubuntu 20.04, install firewall ubuntu 22.04

how to install firewall in ubuntu. There are any references about how to install firewall in ubuntu in here. you can look below.

install firewall ubuntu 20.04

install firewall ubuntu 22.04

how to install firewall in ubuntu, install firewall ubuntu 20.04, install firewall ubuntu 22.04

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