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redge9987's avatar
redge9987
Aspirant
Jan 11, 2026
Solved

PR60X Cloudflare DDNS

I am getting an "Authentication unsuccessful" for my Cloudflare DDNS. I have tested my api token so I know it works. I think it may be the username. I have tried my email address tied to the api toke...
  • maritn78uuujje's avatar
    Jan 11, 2026

    The "Authentication unsuccessful" error in router-based DDNS setups is frequently caused by the router using an outdated Global API Key protocol rather than the modern API Token standard. If your router requires a username and won't let you leave it blank, it is likely expecting your Cloudflare email address paired with your Global API Key (found under My Profile > API Tokens), rather than a scoped Bearer token. If you must use a scoped API Token and the router demands a username, try entering token or bearer as a placeholder, but be aware that many older router firmwares simply do not support the Authorization Header format required for new tokens and will only work with the Global Key.

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