Dahua

Q: How do I reset the device via telnet?
A: After you login via telnet, issue these commands:
# rm -rf /mnt/mtd/Config/
# rm -rf /mnt/mtdbak/Config/
# reboot

https://fossies.org/linux/john/src/dahua_fmt_plug.c

Стандартный логин — root, пароль — vizxv.