AdGuard Home on Ubuntu Server - DoT/DoH Not Working #7554

thisnamebusy · 2025-01-07T13:07:34Z

thisnamebusy
Jan 7, 2025

Hello,
I might be missing something or misconfigured my setup. I have AdGuard Home running on an Ubuntu server.

Network structure:
Keenetic router:

PPPoE connection
External IP: xx.xx.xx.xx
DNS: 1.1.1.1 and 1.0.0.1
LAN settings:
IP: 192.168.1.1/24
DHCP configuration:
IP range: 192.168.1.101/24
Gateway: 192.168.1.1
DNS: 192.168.1.101
Ubuntu server (Ethernet):

Static network configuration (netplan):
IP: 192.168.1.101/24
Gateway: 192.168.1.1
DNS: 1.1.1.1, 1.0.0.1
Client 1 (Wi-Fi):

DHCP network configuration:
IP: 192.168.1.5/24
Gateway: 192.168.1.1
DNS: 192.168.1.101
Client 2 (Wi-Fi):

DHCP network configuration:
IP: 192.168.1.7/24
Gateway: 192.168.1.1
DNS: 192.168.1.101
The router establishes the PPPoE connection. The Ubuntu server with AdGuard Home is connected to the router via Ethernet. Clients receive static IPs via the router's DHCP (lease duration is one day, so IPs don’t change) and use the AdGuard Home DNS.

AdGuard Home filters are working and blocking ads (though not all), as seen in screenshot 1. However, DoT (DNS over TLS) and DoH (DNS over HTTPS) are not functioning. I'm confident I’ve made a mistake due to my limited knowledge. I don’t use encryption for AdGuard Home itself because the wiki states that encryption isn’t required for local installations. However, is it correct that I can configure AdGuard Home to provide DoT/DoH for devices outside my local network?

Upstream DNS servers in AdGuard Home:

https://doh.opendns.com/dns-query tls://dns.opendns.com https://cloudflare-dns.com/dns-query tls://one.one.one.one https://dns.quad9.net/dns-query tls://dns.quad9.net https://security.rabbitdns.org/dns-query https://doh.360.cn/dns-query tls://dot.360.cn

Issue:
When AdGuard Home is enabled, I either cannot access https://1.1.1.1/help or need to refresh the page multiple times to load it.