Fedora Steam Link Firewall Rules

unblock_steam_ports.sh

#!/bin/bash

# Author: OPVL (08/01/2026)

# This script is designed for Fedora users to manage Steam ports in the firewall.
# You will need to run this script if you've been able to pair your Steam Link
# but unable to run a network test. You will have seen a message like:
# Network Test Failed - Couldn't connect to {HOSTNAME} on port 27031
# USAGE:
#   - Download the script to your Fedora machine
#   - Make it executable: chmod +x unblock_steam_ports.sh
#   - Run the script with sudo privileges to unblock the ports:
#       ./unblock_steam_ports.sh unblock
#   - To block the ports again, run:
#       ./unblock_steam_ports.sh block
# No warranty is provided. Use at your own risk.

function unblock_steam_ports() {
    echo "Unblocking Ports: 27031/udp, 27036/udp, 27036/tcp, 27037/tcp"
    read -p "Do you wish to continue? (y/n) " -n 1 -r
    echo
    if [[ ! $REPLY =~ ^[Yy]$ ]]; then
        echo "Operation cancelled."
        exit 0
    fi
    
    sudo firewall-cmd --permanent --zone=public --add-port=27031/udp
    sudo firewall-cmd --permanent --zone=public --add-port=27036/udp
    sudo firewall-cmd --permanent --zone=public --add-port=27036/tcp
    sudo firewall-cmd --permanent --zone=public --add-port=27037/tcp
    sudo firewall-cmd --reload
    
    echo "Changes applied & firewall reloaded. Please restart Steam for the changes to take effect."
}

function block_steam_ports() {
    echo "Blocking Steam ports in the firewall..."
    read -p "Do you wish to continue? (y/n) " -n 1 -r
    echo
    if [[ ! $REPLY =~ ^[Yy]$ ]]; then
        echo "Operation cancelled."
        exit 0
    fi
    
    sudo firewall-cmd --permanent --zone=public --remove-port=27031/udp
    sudo firewall-cmd --permanent --zone=public --remove-port=27036/udp
    sudo firewall-cmd --permanent --zone=public --remove-port=27036/tcp
    sudo firewall-cmd --permanent --zone=public --remove-port=27037/tcp
    sudo firewall-cmd --reload
    
    echo "Changes applied & firewall reloaded. You will no longer be able to use Steam Link."
}

case "$1" in
    unblock)
        unblock_steam_ports
    ;;
    block)
        block_steam_ports
    ;;
    *)
        echo "Usage: $0 {unblock|block}"
        exit 1
    ;;
esac