I set up SSL certificates for my internal services behind Traefik, but I was having some issues obtaining the certificates. I ended up having to add this line in my Docker compose file to bypass PiHole which is controlling the internal hostnames for my domain:
- --certificatesresolvers.letsencrypt.acme.dnschallenge.resolvers=1.1.1.1:53,1.0.0.1:53
After adding that, I was able to successfully pull a cert. The issue is, I have a firewall set up that blocks DNS requests from everywhere except my DNS servers (PiHole), so I had to pause that rule temporarily to get the request to go through.
Wondering what I can do here (if anything) to resolve this without having to disable my firewall rules regularly.
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I would start by testing if you can resolve acme-v02.api.letsencrypt.org from the PiHole and if not, see what you need to unblock that.
Did some more testing to get some details. The error I am getting from Traefik is that Cloudflare cannot create the record because it already exists (PiHole already has the entries). If I delete the records from PiHole, Traefik can then create the TXT records in Cloudflare.
Create a new rule on the firewall to allow DNS requests to cloudflare from that host only.
That is what I ended up doing temporarily, but I think I will just make it temporarily permanent. I could likely set up another Docker container to run a DNS server connected to a DoH resolver, and use that container as the DNS server for Traefik, but that’s a lot of work.
Acronyms, initialisms, abbreviations, contractions, and other phrases which expand to something larger, that I’ve seen in this thread:
Fewer Letters More Letters DNS Domain Name Service/System PiHole Network-wide ad-blocker (DNS sinkhole) SSL Secure Sockets Layer, for transparent encryption
3 acronyms in this thread; the most compressed thread commented on today has 7 acronyms.
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