Throughout now more than 25 years of practicing, I have come though Several Network types, on Routers were I have build many different olutions for customer – if its a High-Availability Router to a Simpel Debian Iptables Firewall with a 3G Modem in.
Therefor I making it into a sub menu, where I list different Systems and types, scripts tip and tricks for doing this kind of setup. Allthough many of the installations are different – the main issue is – can the customer trust their router ?.