How to permanently turn off ADB

IoT Modules LTE Standard Module
1

Hi,
I would like to ask if it’s possible to permanently turn off ADB and all the other debug interfaces on EC25-EUX modems.
Thank you.

2

If you have direct access to the module, you can switch everything back on via the debug console. But you can set your own password for the root user or rename it so that nobody can log in to the module at all.
Also, you should not provide access to the USB port when designing the board - so there will be access to the com port for AT commands.

But all this is completely useless if the engineer has a board with a modem in his hands ))

3

Dear @ok1gal ,

Thank you for reaching out.

Yes, it is possible to disable ADB on EC25-EUX and prevent it from being re-enabled in normal field use.

  1. Disable ADB from the USB composition using AT+QCFG=“usbcfg” (set the ADB parameter to 0), then reboot the module so the change takes effect.

  2. Enable Secure Debugging (AT+QSECCFG debug password) to lock debug-related configurations, so ADB and other debug interfaces cannot be re-enabled without authorization.

For production security, we also recommend not exposing the USB/debug access in the final hardware design.

Best Regards,
Aghelan