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Routing local requests directly to server instead of cloudflare tunnel (feddit.de)

submitted 11 months ago* (last edited 11 months ago) by [email protected] to c/[email protected]

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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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[–] [email protected] 1 points 11 months ago* (last edited 11 months ago)

Looking at the output of that command I get the following for my ethernet network interface

DNS-Server  . . . . . . . . . . . : fd98:1919:5915:0:3053:4134:bdc9:295d
                                          192.168.1.60
                                           fd98:1919:5915:0:3053:4134:bdc9:295d

Using nslookup on that IPv4 address tells me that all of those addresses are pointing to my pi-hole

nslookup 192.168.1.60

Server: pi.hole
Address: fd98:1919:5915:0:3053:4134:bdc9:295d

Name: pi.hole
Address: 192.168.1.60

I've added another local DNS entry on my Pi-Hole which points the domain I use to the same server but this time uses its IPv6 address. That doesn't seem to help though or it takes some time to update. I flushed the DNS cache on my machine after adding this entry though.