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On .LAN domains, how to stop firefox switching to https (when it's not available) and stop complaining about self-signed certificates when it is available ? (lemmy.ml)

submitted 4 days ago by [email protected] to c/[email protected]

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I'm just so annoyed of fighting this all the time.

If I can't figure this out I'm going to disable all https redirecting and all certificate errors off so I can have some peace

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[–] [email protected] 18 points 3 days ago* (last edited 3 days ago) (2 children)

IMO it's easiest to just use a real domain for your local network. For example, I use subdomains of int.example.com, where example.com is my blog.

Then, you can get Let's Encrypt or ZeroSSL certificates for all the hosts. Systems do not need to be accessible over the internet - you can use an ACME DNS challenge instead of a HTTP one. Use something like certbot or acme.sh and renewals will be automated.

The only cost is for one domain, and some TLDs are less than $5/year. Check tld-list.com and sort by renewal price, not registration price (as some are only cheap for the first year).

[–] [email protected] 4 points 3 days ago

This is the way to do it - actual valid certs, with actual working TLS.

OP's issue is they don't understand how SSL works and fighting Firefox, which is actually trying to protect them and steer they e in the right direction.

[–] [email protected] 4 points 3 days ago* (last edited 3 days ago) (1 children)

So you get a wildcard cert for the public domain, and only go one level deep on your LAN, reusing the wildcard cert? That's a pretty cool trick.

[–] [email protected] 6 points 3 days ago* (last edited 3 days ago)

I use a wildcard cert in some places, but most of them are individual certs. You can have multiple ACME DNS challenges on a single domain, for example _acme-challenge.first.int.example.com and _acme-challenge.second.int.example.com for first.int.example.com and second.int.example.com respectively.

The DNS challenge just makes you create a TXT record at that _acme-challenge subdomain. Let's Encrypt follows CNAMES and supports IPv6-only DNS servers, so I'm using some software called "acme-dns" to run a DNS server specifically for ACME DNS challenges. It's just listening on a IPv6 in one of my VPS /64 IPv6 range.