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Should I be concerned with exposing my server to the public?

Hey all! For the longest time I’ve had a server that hosts some things (eg Syncthing), but is only available via SSH tunneling.

I’ve been thinking of self-hosting more things like Nextcloud and Vaultwarden. I can keep my SSH tunneling setup but it might make it difficult to do SSL.

How do you manage the security of having public-facing servers?

hib ,

Here is my setup:

Cloudflare fronts all of my webserver traffic, and I have firewall rules in Cloudflare.

Then I have an OPNsense firewall that blocks a list of suspicious ips that updates automatically, and only allows port 80/443 connections from Cloudflare’s servers. The only other port I have open is for Wireguard to access all of my internal services. This does not go through Cloudflare obviously, and I use a different domain for my actual IP. I keep Vaultwarden internal for extra safety.

Next I run every internet facing service in k3s in a separate namespace. This namespace has its own traefik reverse proxy separate from my internal services. This is what port 80/443 forwards to. The namespace has network policies that prevent any egress traffic to my local network. Every container in the WAN facing namespace runs as a user with no login permission to the host. I am also picky about what storage I mount in them.

If you can get through that you deserve my data I think.

skywhale241 ,

I need to learn more about cloudflare. Do you have the guide for this setup!

hib ,

Unfortunately no guide, just things I’ve pieced together myself over the years.

Cloudflare is probably the easiest and most intuitive part of the setup though, you can setup dns/proxy/firewall rules very intuitively, and I’m sure there are plenty of guides out there.

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