gloglo

For those that still want to access the content of the ftp you can find its content from 2014 there: https://archive.org/download/ftp.zyxel.com

Thank you but there's no firmware for the 4215. What is strange is that I can see messages (not that old) linking to the zyxel ftp. But when you go there, there's not even a single PLA folder... It looks like Zyxel suddenly decided to erase everything for no obvious reason. The user manual is easy to find but that page…