ZyXEL 202H 91-003-194003B User Manual

P-202H Plus v2 User’s Guide

Chapter 29 Firmware and Configuration File Maintenance

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This chapter tells you how to backup and restore your configuration file as well as upload new 
firmware and configuration files.

The configuration file (often called the romfile or rom-0) contains the factory default settings 
in the menus such as password, DHCP Setup, TCP/IP Setup, etc. It arrives from ZyXEL with a 
“rom” filename extension. Once you have customized the ZyXEL Device's settings, they can 
be saved back to your computer under a filename of your choosing.

 ZyNOS (ZyXEL Network Operating System sometimes referred to as the “ras” file) is the 
system firmware and has a “bin” filename extension. With many FTP and TFTP clients, the 
filenames are similar to those seen next. 

Note: Only use firmware for your ZyXEL Device’s specific model. Refer to the label on 

the bottom of your ZyXEL Device.

ftp> put firmware.bin ras

This is a sample FTP session showing the transfer of the computer file " firmware.bin" to the 
ZyXEL Device.

ftp> get rom-0 config.cfg

This is a sample FTP session saving the current configuration to the computer file 
“config.cfg”.

If your (T)FTP client does not allow you to have a destination filename different than the 
source, you will need to rename them as the ZyXEL Device only recognizes “rom-0” and 
“ras”. Be sure you keep unaltered copies of both files for later use.