Here is a quick rundown on how to make a simple Debian box into a router Removed un-needed items apt purge iptables Install required items apt install bridge-utils firewalld dnsmasq Enable IP Forwarding sed -i 's/#net.ipv4.ip_forward=1/net.ipv4.ip_forward=1/g' /etc/sysctl.conf Find NICs ip a to find the NICs Now we create the bridge. This is assuming your device has three NICs and you want two for LAN and one for WAN nano /etc/network/interfaces