this post was submitted on 19 Sep 2023
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Routing local requests directly to server instead of cloudflare tunnel (feddit.de)
submitted 1 year ago* (last edited 1 year ago) by Scrath@feddit.de to c/selfhosted@lemmy.world
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Hey everyone, I wanted to ask for some help regarding my DNS setup and for routing requests to my selfhosted services.

Currently I use Pi-Hole as a DNS server with my routers default DNS server as the upstream server. This allowed me to define local DNS entries using Pi-hole and route my requests to these domains directly to my local services. For example I bought a domain a while ago and in preparation for setting it up, I had it entered as a local DNS entry pointing directly to my servers IP address.

Earlier today I finally got around to setting up a cloudflare tunnel to expose one of my services to the outside world using the domain I bought. Ever since I did that, all requests to that domain seem to exit my home network, go through cloudflares network and then return through the tunnel, even though I have a local DNS entry for that domain name.

What I would prefer is for the request to be routed directly to my server instead, since I am in the same network already. Since my DNS server is the Pi-Hole, I figured this should happen automatically.

Is there an issue with my Pi-Hole setup? If there is any information missing I'll be happy to provide it. I wasn't sure what information I could safely post here.

Solution

I think I managed to fix the problem. After enabling the option Never forward reverse lookups for private IP ranges in Pi-Hole and clearing my DNS cache again, nslookup only returns local IP addresses instead of the IPv6 address of two cloudflare servers.

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[–] NeoNachtwaechter@lemmy.world 1 points 1 year ago* (last edited 1 year ago) (1 children)

Is there a NAT involved?

In my config, the requests asking for my own servers from the internal network get answered the local address 192.something, and so they cannot get routed 'outside'.

When asking from the outside, I do not answer it, so they get the public address from a public DNS.

[–] Scrath@feddit.de 1 points 1 year ago

I didn't set anything like that up. Is that something that might be enabled by default on my router? If so, how do I check it?