Comment on How is everyone dealing with Android 17's "Nearby Devices" change?
Lenna@piefed.ca 8 hours ago
I had my DNS configured so my public-facing server resolved to a local IP address when on my LAN. This meant that my web, immich, xmpp, NTP, jellyfin and DoH servers all resolved to a local IP address on wifi.
I unfortunately don’t have an answer to your question since I’m not on Android 17, but I do want to ask about this part. What’s the benefit of this? Does it improve speed when streaming on Jellyfin?
Not OP but I do the same for two reasons.
A) it eleimitaes my ISP traffic. It doesn’t have to go out to my router, to come back in on the public IP. They can’t track what never hits them.
B) I also have completely internal services. So the DNS entries are internal only. Can’t map my internal network publicly.
A router shouldn’t be sending that traffic outside. It should already have routes to send it right back, either regular or NAT rules.
I’ve also got a completely different DNS config for WAN and LAN traffic. WAN devices can only resolve PTR records for my mail server. My LAN devices have DDNS so internally they a get allocated DNS entries by hostname. Even my guest network has a different config for isolation.
They definitely all need to be kept separate.
Would you have any recommendations to resources where I can read about setting something like this up? I’ve recently picked up a managed switch and set up a computer to act as a router, and I’ve been learning how VLANs be. I don’t have things fully working on my home network yet, though, but I’m very interested!
I don’t know how the others set theirs up, but I use “views” in bind 9 kb.isc.org/docs/aa-00851
Essentially, the DNS I run on a router-like box much like you describe uses a different database depending on whether you query from an internal IP address or a public address. For me, the advantages are that I can let devices on my local network declare their own names to DHCP and enter them in DNS without worrying about the outside world. Mu internal network doesn’t crash if my ISP changes my address, Certbot happily requests certs for any site with a public address, and that cert works seamlessly on the corresponding internal address, no wildcards or DNS challenge required.
That’s exactly what I’m doing.
That’s so sick! That’s definitely above my skill level at the moment, but I will save this for when I’m more knowledgeable—thank you much!
If you host your own internal dns server like a pihole, you can just add them in as local names.
Careful of something called split brain dns though.
Thank you! I currently do run a PiHole, which I’ve been running for like six years? I really need to get that updated as well hahaha. I’ll look into doing it they way!
I’ll admit I dont have one.
I’ve been meaning to write one myself on how I use things. As how I’ve gotten it to work has really been from a decade of doing this professionally. And I have opnions.
I’ll for sure post links to this community when I have them.
Do your apps complain about SSL certs?
Nope. SSL certs are pinned to the hostname, not the IP address. I can change the IP address in DNS and it will still work.
Traefik serves DNS challenge certificates
pHr34kY@lemmy.world 3 hours ago
Routing between two interfaces on the same NIC takes nanoseconds. You wouldn’t notice a performance difference.
When I first set it up, I didn’t have a static IP address, so it would not be great when it changed. I also want my server to remain reachable locally if my internet goes down. I had different firewall/ACL rules for wifi too. For example, some of my internal websites only prompt for a login if you’re outside the network.
IPv6 has been awesome here. I have my server and clients on different /64 subnets in the same /48 block. The nearby devices on Android assumes only the same /64 is local.