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Why does this mysterious login page suddenly appear whenever I try to access my services? (alien.top)

submitted 1 year ago by WassiChain@alien.top to c/main@selfhosted.forum

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Issue: Random 2FA login screen appears whenever I try to access my services, I have not set up 2FA on my server. Still shows up even when I stop and remove Caddy container, maybe something went wrong on DuckDNS's side?

Additional info: Server runs on Debian 12, I use DuckDNS and Caddy for reverse-proxy, and mainly use the server for Jellyfin, Nextcloud, Vaultwarden, and Komga all on Docker.

Have I been hacked? I stopped all the containers but should I also power off my machine? Any help would be appreciated, sorta panicking lol

https://preview.redd.it/k8wp4svjmzvb1.jpg?width=1905&format=pjpg&auto=webp&s=c76a891bd0540268ac11cd6e255eb5f960cc74f4

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[–] jonne@infosec.pub 2 points 1 year ago* (last edited 1 year ago)

Are you accessing it over DNS or through its IP address? Does it show for both?

Edit: the security fabric login screen appears to be something from a Fortinet firewall. Do you have a hardware firewall?