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If Nothing is Exposed, Am I Safe? (lemmy.dbzer0.com)

submitted 1 week ago* (last edited 1 week ago) by No_Bark@lemmy.dbzer0.com to c/selfhosted@lemmy.world

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Hello most excellent Selfhosted community,

I'm very new to this and am confused about how vulnerable my server and/or home network is with my current setup.

I just got a basic server up and running on a machine with proxmox and a DAS for 10tb of storage. I've got two LXCs running for a docker deployed arr stack and jellyfin+jellyseer stack. The proxmox server is connected to a router attached to a fiber ONT. Everything is accessed over the home LAN network and that's it.

Everything is working correctly and my containers are all talking to each other correctly via ip addresses (gluetun network on the arr stack container). I've been reading up on reverse proxies and tailscale to connect to the server from outside my LAN network, and it's mostly gone over my head, but it did make me concerned about my network security.

Is my current set up secure, assuming strong passwords were used for everything? I think it is for my current uses - but I could use a sanity check, I'm tired. I'm open to any suggestions or advice.

I own a domain that I don't use for anything, so it would be cool to get reverse proxy working, but my attempts so far have failed and I learned I'm behind a double NAT (ONT and router) - and attempts to bypass that by setting the ONT into bridge mode have also failed. I don't really need to access anything from outside my home network right now - but I would like to in the future.

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[–] r0ertel@lemmy.world 7 points 1 week ago

I was hacked years ago. I was hosting a test instance of a phpbb for a local club. Work blocked SSH, so I opened up telnet. They either got in from telnet or a php flaw and installed password sniffers and replaced some tools (ps, top) with tools that would hide the sniffer service they installed.

After that, I changed my model. My time lab is for learning and having fun. I'm going to make mistakes and leave something exposed or vulnerable and hackers are going to get in. Under this new model, I need to be able to restore the system easily after a breach. I have a local backup and a remote backup and I have build scripts (ansible) so that I can restore the system if I need to. I've had to do this twice. Once from my own mistake and one from hardware failure.