Download the lzs compress and decompress tools from http://git.kopf-tisch.de/?p=zyxel-revert;a=summary
After clicking on the link given above, click on snapshot link in front of support firmwareupdate master
Once you have down loaded the zyxel-revert-779bfd5.tar.gz file to your Desktop, perform the following steps
root@kali1:~/Desktop# tar -xzf zyxel-revert-779bfd5.tar.gz
root@kali1:~/Desktop# cd zyxel-revert-779bfd5/
root@kali1:~/Desktop/zyxel-revert-779bfd5# ls
Compile the source code with makefile.
root@kali1:~/Desktop/zyxel-revert-779bfd5# make -f Makefile
To decompress rom-0 file
root@kali1:~/Desktop/zyxel-revert-779bfd5# ./decompress /root/Desktop/rom-0
The result of decompressed file is rom-0.decomp (original-filename.decomp).
Show printable strings from decompressed file.
root@kali1:~/Desktop/zyxel-revert-779bfd5# strings /root/Desktop/rom-0.decomp
Password usually on first line
