Secrets of Technology

Adventures in the Network.

Exploring Firmware of a Zyxel Switch

by Brian Murphy @ 2024-03-04 03:31:55

zyxel managed switch doom bix squashfs sasquatch busybox initramfs jffs2

Day to day, I deal with enterprise grade network equipment. Products made by companies like Cisco, HPE Aruba, and FortiNet. Equipment that is at home in a small factory's network closet and an enterprise data center. I can't deny that it is a lot of fun working with this equipment, but there is always something missing.

Dumping the Flash

by Brian Murphy @ 2024-03-10 10:53:47

zyxel managed switch mtd mtdblock jffs2 binwalk minicom expect python u-boot

While analyzing the boot process of a Zyxel GS1900-24HPv2 Managed Switch, it became apparent that I would need to analyze the flash storage on the board. Lacking access to the operating system, and with no way to connect a display or keyboard, I knew this was going to be a fun project.