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Random requests to my private Jellyfin instance (lemm.ee)

submitted 9 months ago by [email protected] to c/[email protected]

30 comments fedilink hide all child comments

I have a Jellyfin instance on my local server which I forward to the public web via a cloudflare tunnel. I'm not sure how secure it is, and I keep getting random requests from all over the world. It's my first experience maintaining something on a public domain so I may be worrying about something obvious, but some advice would still be appreciated.

My SSL/TLS encryption mode appears to be "Full".

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[–] [email protected] 66 points 9 months ago* (last edited 9 months ago) (3 children)

That will always happen with something exposed to internet. Attackers scan every IP and domain they can looking for vulnerabilities to exploit. There's software you can put in place to block requests that look like exploit attempts. Cloudfare WAF is one example. But those are mitigations only and not perfectly effective. Beyond that there's not much you can do. Always make sure anything you expose to the internet is configured securely and kept up to date. If it makes you uncomfortable, reconsider exposing it like that.

[–] [email protected] 13 points 9 months ago* (last edited 9 months ago) (1 children)

bots will start hitting a brand new subdomain on my web server literally seconds after creating it. looking for exploitable scripts like wordpress, usually.

[–] [email protected] 5 points 9 months ago (1 children)

You can avoid these scans by only using wildcards on your DNS entries and SSL certificates.

Both of these are commonly used by bots to find new domains.

[–] [email protected] 3 points 9 months ago (1 children)

Wildcard SSL subjects make sense as the certificate is public. But how does wildcard DNS help? They aren't public other than the requests coming from the client which don't use wildcard anyway.

[–] [email protected] 1 points 9 months ago

I would not depend on DNS records being private. On the off chance that one of the nameservers messes up, I would prefer if no subdomains are leaked.

But you're correct, most of the time those leaks happen somewhere else.

[–] [email protected] 8 points 9 months ago

Thanks, that helped!

[–] [email protected] 6 points 9 months ago

Fail2ban works if they don't have infinite IP addresses