Selfhosted
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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A VPS makes sense insofar as keeping things thoroughly isolated from my own systems, but the overhead of maintaining a box that's directly connected to the Internet like that isn't something I'm keen on and I'm not convinced I'd have the expertise to do it right from the outset.
Change the ssh port to something with 4-5 digits, disable ssh password Auth and use certificates only, don't expose any port other than ssh and 443.
If you're paranoid, use cloudflare as a proxy and set the VPS firewall to only accept incoming traffic from cloudflares ip list.
That's about it really.
Changing port is security by obscurity and it doesn’t take much time for botnets to scan all of IPV4 space on all ports. See for example the ever updated list that’s available on Shodan.
Disable password login and use certificates as you’ve suggested already, add fail2ban to block random drive-bys, and you’re off to the races.
The Oracle Cloud VPS only has SSH key authentication enabled by default. You can also set it to only allow SSH from your home IP in the virtual firewall before the machine is ever spun up.
Their current free ARM offering is 1 machine with 4-cores and 24gb RAM for life. You can also add another 2 AMD machines with 1-core and 1gb RAM and still be in their free-tier.
If you're going to set it up and take advantage of the ARM machine, make sure you pick a home location for your account that has multiple availability zones. San Fran right now only has 1 zone, so if the shared ARM instances are all used up, you'll have to wait a few days and try again. Phoenix I think has 3, so you can try with another zone right away.
I guess I'm extremely paranoid then, my home IP doesn't change much and I just expose the port only to it from Oracle's site. I rarely touch mine though.
I just restrict SSH to an internal VPN IP on all my servers (ZeroTier). 100% impossible to even try logging into them unless you've managed to crack into my network first.