![]() ![]() If you’re just getting started with your firewall, the first rules to define are your default policies. Before enabling UFW, however, you will want to ensure that your firewall is configured to allow you to connect via SSH. Now when UFW is enabled, it will be configured to write both IPv4 and IPv6 firewall rules. If you’re using nano, press CTRL+X, then Y, then ENTER to save and exit the file. Locate IPV6 in the file and ensure the value is yes: To configure this, open the UFW configuration file /etc/default/ufw with nano or your favorite editor: This will ensure that UFW will manage firewall rules for IPv6 in addition to IPv4. If your Debian server has IPv6 enabled, you will want to ensure that UFW is configured to support IPv6. This tutorial is written with IPv4 in mind but will work for IPv6 as well if you enable it. You will set up UFW and enable it in the following steps. If you followed the entire Initial Server Setup tutorial, you will have installed and enabled UFW. ![]() Step 1 – Installing UFWĭebian does not install UFW by default. To follow this tutorial, you will need one Debian 11 server with a sudo non- root user, which you can set up by following Step 1 through 3 in the Initial Server Setup with Debian 11 tutorial. This tutorial will show you how to set up a firewall with UFW on Debian 11. If you’re looking to get started securing your network, and you’re not sure which tool to use, UFW may be the right choice for you. UFW, or Uncomplicated Firewall, is a simplified firewall management interface that hides the complexity of lower-level packet filtering technologies such as iptables and nftables. ![]()
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