this post was submitted on 22 Jul 2023
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Lemmy.world update: Downtime today / Cloudflare (lemmy.world)
submitted 1 year ago by ruud@lemmy.world to c/lemmyworld@lemmy.world
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Today, like the past few days, we have had some downtime. Apparently some script kids are enjoying themselves by targeting our server (and others). Sorry for the inconvenience.

Most of these 'attacks' are targeted at the database, but some are more ddos-like and can be mitigated by using a CDN. Some other Lemmy servers are using Cloudflare, so we know that works. Therefore we have chosen Cloudflare as CDN / DDOS protection platform for now. We will look into other options, but we needed something to be implemented asap.

For the other attacks, we are using them to investigate and implement measures like rate limiting etc.

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[โ€“] ItsMyFirstDay@lemmy.world 91 points 1 year ago (1 children)

In case you haven't considered this, some helpful advice. To keep them from the lemmy.world door after the CDN installation

  • Change the public IP addresses
  • rotate your certificates
  • block all traffic appart from the CDN and only allow a limited known good IP addresses (like yours and your support team). These steps will make your server harder to find, hopefully they move on.
[โ€“] daniyyel@lemmy.world 17 points 1 year ago (1 children)

You might have Cloudflare add a request header to the origin request, like x-cloudflare-key: <somesecret>, and then configure nginx on the server to block everything not containing that header.

[โ€“] Ocelot@lemmies.world 5 points 1 year ago

just block ingress to your server from non cloudflare IPs or use argo tunnel.