Att Router Passthrough with Pi Hole

#network #internet #router

Just recently I was setup with At&t internet. They generously provide a dual modem/router with the service. I was having a time trying to use my own router.

Passthrough mode

At&t's official docs is a bit incomplete. This PCGuide tutorial was a bit more helpful.

My Router

I'm using a TP-Link router. Logging into it's dashboard I confirm that it is getting internet connection (also shown on the led lights as green. Amber meaning connection failure)

Make sure they are running on different subnets. Example:

At&t -> 192.168.1.1 http://192.168.1.254/cgi-bin/home.ha
TP-Link -> 192.168.0.1

Pi-Hole

I run a Pi-hole that handles DNS and DHCP. This is where things got tricky. My Upstream DNS server https://pi.hole/admin/settings/dns had no options checked (Google, Cloudflare, OpenDNS, etc.) I had set it up using Unbound for extra privacy but it seems like I have to re configure that...? For now I'm just using Cloudflare and OpenDNS just to get things working

PiVPN

I've noticed anytime I've moved that I also have to generate new VPN keys. Idk why, but same problem here.

Video Tutorial

https://www.youtube.com/watch?v=aShbl1JZMx8

Port Forward on Att Modem

I was having trouble with accessing my services (pointed to public domain's) when on my local network. Here is an example

My website www.WilliaMusic.com is a public domain. When on my phone's mobile 5G i can access the site just fine. Once I went on my home's local network I couldn't reach the site. I had to do 2 things

Port forward on the Att Router (screenshots)
1. Something about NAT and the ISP's router still being the Gateway (kinda stumbled through understanding the why)
create local DNS record for outside DDNS
1. All my public DNS points to a DDNS that auto updates (no need for static IP) that domain is MYDOMAIN.duckdns.org
2. on my local DNS with Pi-hole ~~I make a record~~ MYDOMAIN.duckdns.org ~~point to my local server~~ proxy-server.lan (another local DNS record pointing to a local IP) on second thought I don't think this helped and actually made it worse