this post was submitted on 14 Jun 2023
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Self hosted services with SSL cert (self.selfhosted)
submitted 1 year ago by root to c/selfhosted
31 comments fedilink hide all child comments
 

So, I have a few services (Jellyfin, Home Assistant, etc) that I am running, and have been acessing via their IP's and port numbers.

Recently, I started using NGINX so that I could setup entries in my Pi Hole, and access my services via some made up hostname (jellyfin.home, homeassistant.home, etc).

This is working great, but I also own a few domains, and thought of adding an SSL cert to them as well, which I have seen several tutorials on and it seems straight forward.

My questions:

  • Will there be any issues running SSL certs if all of my internal service are inward facing, with no WAN access? My understanding is that when I try to go to jellyfin.mydomainname.com, it will do the DNS lookup, which will point to a local address for NGINX on my network, which the requesting device will then point to and get the IP of the actual server.

  • Are there risks of anything being exposed externally if I use an actual CA for my cert? My main goal is to keep my home setup off of the internet.

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[–] [email protected] 5 points 1 year ago (2 children)

If you use Let's Encrypt, or any public CA, all of your domains and certificates will be public. You can use a wildcard to avoid revealing subdomains. There is a website that you can use to search what is available, but I don't remember what it is.

I suspect there aren't any serious risks to having that information revealed. The only real reason would be privacy against which services you are using on that domain.

[–] phi 4 points 1 year ago (2 children)

yeah true but if the DNS records aren't actually pointing anywhere then there's no real threat no? because everything stays in the internal network

[–] [email protected] 1 points 1 year ago

For the most part yeah. Unless you don't want people to know you're hosting a particular thing for whatever reason.

[–] [email protected] 1 points 1 year ago

You have to use a public DNS registrar, and that DNS record has to point to your public IP if you want to automate to a public CA. All of my subdomains are in my local DNS server though and I use a wilcard for them. So no one externally can go to jellyfin.mydomain.com, but they could go to www.mydomain.com to my IP, but that doesn't forward on my router either.

But also only automated scrappers are going to look for my domain too and they are going to be blocked in the same way automated scrappers for residential IPs are blocked. I could be wrong, but I don't think there are ways to bypass security with knowing the domain name tied to an IP.

[–] [email protected] 3 points 1 year ago* (last edited 1 year ago)

This is probably the site you're thinking of - https://crt.sh/