Seemingly randomly not responding to requests for a short period, then starts working again

[Edgeburn]

Prerequisites

• I have checked the Wiki and Discussions and found no answer

• I have searched other issues and found no duplicates

• I want to report a bug and not ask a question or ask for help

• I have set up AdGuard Home correctly and configured clients to use it. (Use the Discussions for help with installing and configuring clients.)

Platform (OS and CPU architecture)

Linux, AMD64 (aka x86_64)

Installation

Docker

Setup

On a router, DHCP is handled by the router

AdGuard Home version

v0.107.50

Action

DNS queries over plain DNS, DoH and DoT

Expected result

Consistent responses

Actual result

Seemingly random drops that last anywhere from a few seconds to a few minutes

Additional information and/or screenshots

I often see the following in the logs during the dropouts, with the first censored IP address being that of the server, and the second being that of the client. Note that it does not only occur in DNS over TLS, this just happened to be the excerpt I picked out of similar log entries.

handling tcp: reading msg: connection timed out; original error: reading len: read tcp *.*.*.*:853->*.*.*.*:50751: i/o timeout

I have tried changing the upstream DNS servers and this made no difference.

I also changed the network mode to host for the container in my docker compose (AdGuard Home section of which is below) and no longer putting it behind nginx-proxy-manager.

services:
    adguardhome:
        image: adguard/adguardhome
        container_name: adguardhome
        network_mode: host
        environment:
            TZ: America/Toronto
        volumes:
            - /home/edgeburnmedia/adguardhome/conf:/opt/adguardhome/conf
            - /home/edgeburnmedia/adguardhome/work:/opt/adguardhome/work
            - /home/edgeburnmedia/nginx-proxy-manager/letsencrypt:/etc/letsencrypt
        # ports:
            # # DNS
            # - 53:53
            # # DHCP server
            # # - 67:67/udp
            # # - 68:68/udp
            # # HTTPS/DNS-over-HTTPS
            # - 443:443/tcp
            # # DNS-over-TLS
            # - 853:853/tcp
            # # DNS-over-QUIC
            # - 853:853/udp
            # # DNSCrypt
            # - 5443:5443/tcp
            # - 5443:5443/udp
            # # WebUI
            # - 3000:3000/tcp
        restart: unless-stopped

Full logs are available at the following gist: https://gist.github.com/Edgeburn/e10e360a264240bc1cf5ac2717af1819