All the other comments kind of suggest otherwise, but I am pretty certain that fedora comes with firewalld enabled by default.

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I treat all guests on the network as potentially hostile, so I enable firewalls on all of my hosts.

I believe that Fedora’s firewall is enabled by default, but it leaves open ports 1025-65535/tcp and 1025-65535/udp.

To lock down some sane defaults:

sudo firewall-cmd --permanent --remove-port=1025-65535/tcp
sudo firewall-cmd --permanent --remove-port=1025-65535/udp
sudo firewall-cmd --reload

Verify allowed ports with:

sudo firewall-cmd --list-ports

See also:

• https://firewalld.org/
• https://docs.fedoraproject.org/en-US/quick-docs/firewalld/

PS: if you have a Steam Link, you’ll want to open these ports for connectivity:

sudo firewall-cmd --permanent --add-port=27031/udp  # steam remote play
sudo firewall-cmd --permanent --add-port=27036/udp  # steam remote play
sudo firewall-cmd --permanent --add-port=27036/tcp  # steam remote play
sudo firewall-cmd --permanent --add-port=27037/tcp  # steam remote play

Uncomplicated Firewall is easy to setup and understand. It blocks traffic and allows it. Install UFW

sudo apt install ufw

My recommended(Chris Titus)

`sudo ufw limit 22/tcp

sudo ufw allow 80/tcp

sudo ufw allow 443/tcp

sudo ufw default deny incoming

sudo ufw default allow outgoing

sudo ufw enable`

Is this enough?