ZyWALL USG 100 Firmware restore via FTP failed！！！

Bob_1

These days I tried to update the firmware via FTP, and then the device cannot be started, I connected the serial port, and the following information is displayed.

I update the firmware according to the prompt FTP connection, and then it keeps saying that it failed, I don't know what to do.

I was writing this question and suddenly realized that I used the firmware of the usg100-plus on the usg100. Well, it seems I can't figure it out.

Zyxel_Cooldia

Hi @Bob_1,

Welcome to Zyxel community. In the process of firmware recovery, if you find the error messages "extract_fw_info: Fail = 255" on console,  you may check Windows Firewall settings and disable Windows Firewall temporarily on your laptop.

Ref: https://community.zyxel.com/en/discussion/12943/recovery-steps-for-usg-flex-atp-series-application-patrol-signature-issue/p1