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This article mainly shows you "linux how to enable the firewall", the content is easy to understand, clear, hope to help you solve your doubts, the following let the editor lead you to study and learn "linux how to enable the firewall" this article.

Enable firewall

Now you need to install a firewall, enable it, and configure it to allow only the network traffic you specify to pass through. Simple UFW (on Ubuntu) is an easy-to-use iptables interface that greatly simplifies the firewall configuration process.

You can install UFW in the following ways:

$sudo apt install ufw

By default, UFW rejects all incoming connections and allows all outgoing connections. This means that any application on the server can access the Internet, but any content that attempts to access the server cannot be connected.

First, make sure you can log in by enabling access to SSH, HTTP, and HTTPS:

$sudo ufw allow ssh$ sudo ufw allow http$ sudo ufw allow https

Then enable UFW:

$sudo ufw enable

You can see which services are allowed and denied in the following ways:

$sudo ufw status

If you want to disable UFW, you can disable it by typing:

$sudo ufw disable

You can also use firewall-cmd (on RHEL/CentOS), which has been installed and integrated into some distributions.

The above is all the contents of the article "how to enable Firewall in linux". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!

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