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A place to share alternatives to popular online services that can be self-hosted without giving up privacy or locking you into a service you don't control.

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Have I been DoS'd? (lemmy.world)

submitted 1 year ago by Solvena@lemmy.world to c/selfhosted@lemmy.world

31 comments fedilink hide all child comments

Hi,

I know this is quite impossible to diagnose from afar, but I came across the posting from lemmy.world admins talking about the attacks they are facing where the database will get overwhelmed and the server doesn't respond anymore. And something similar seemed to have happened to my own servers.

Now, I'm running my own self-hosted Lemmy and Mastodon instances (on 2 seperate VPS) and had them become completely unresponsive yesterday. Mastodon and Lemmy both showed the "there is an internal/database error" message and my other services (Nextcloud and Synapse) didn't load or respond.

Login into my VPS console showed me that both servers ran at 100% CPU load since a couple of hours. I can't currently SSH into these servers, as I'm away for a couple of days and forgot to bring my private SSH key on my Laptop. So, for now I just switched the servers off.

Anyway, the main question is: what should I look at in troubleshooting when I'm back home? I'm a beginner in selfhosting and I run these instances just for myself and don't mind if I'd have to roll them back a couple days (I have backups). But I would like to learn from this and get better at running my own services.

For reference: I run everything in docker containers behind Nginx Proxy Manager as my reverse proxy. I have only ports 80, 443 and 22 open to the outside. I have fail2ban set up. The Mastodon and Lemmy instances are not open for registration and just have 2 users each (admin + my account).

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[–] Decronym@lemmy.decronym.xyz 10 points 1 year ago* (last edited 1 year ago) (2 children)

Acronyms, initialisms, abbreviations, contractions, and other phrases which expand to something larger, that I've seen in this thread:

Fewer Letters	More Letters
DNS	Domain Name Service/System
IP	Internet Protocol
SSH	Secure Shell for remote terminal access
UDP	User Datagram Protocol, for real-time communications
VPN	Virtual Private Network
VPS	Virtual Private Server (opposed to shared hosting)

6 acronyms in this thread; the most compressed thread commented on today has 9 acronyms.

[Thread #29 for this sub, first seen 12th Aug 2023, 08:45] [FAQ] [Full list] [Contact] [Source code]

[–] Oha@feddit.de 1 points 1 year ago

Very Very good bot

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