Synology: DSM - Reset Two-factor authentication

If you can't login to your Synology NAS WebGUI (DSM), because you lost the 2FA authentication key (for exmaple you lost your phone), then you can reset this 2-factor authentication.

Remove 2FA authentication (for example with google authenticator)

• Connect to your NAS with SSH
• Run following commands:

sudo -i
cd /usr/syno/etc/preference/
rm google_authenticator

Description

First line: switch to user root Second line: switch directory to authentication settings Third line: remove google authentication configuration.