I use version 176 of the "friendly" firmware for my WZR-HP-G300NH wireless router. I believe that this is the latest compatible firmware.
In the HTML pages that control the router, there is a page /NAS / User Management/. This page lists a default account named "guest." that I would like to understand. This account cannot be edited or deleted. I cannot find its password, so I cannot log in as "guest" in order to see what it can do. I have got the NAS server working by defining my own username/pasword, but I would like to understand what the guest username does too.