I went through it myself and couldn't find directly any obvious errors that would lead to this issue. I've generated and uploaded the debug logs. I'm pretty sure something is wrong with my setup rather then my browser or device since it is happening throughout my entire network (iPhone, Apple TV, Windows devices & MacOS devices) Debug Token: The weird thing is that if I use 'dig' to measure performance there's no significant delay noticeable: dig a -p 53 | grep time See below an example of loading a page from where it took 29.19s to load the page: The ODROID C4 load is at the bare minimum so I doubt it is a resource issue. If I configure cloudflare DNS (1.1.1.1, 1.0.0.1) manually on my network interface I never experience the slowness. I tried different browsers (Google, Brave, Firefox) and the results are similar.

Sometimes it can take up to almost 30 seconds to load a web page. It doesn't happen all the time, but frequently enough that it's noticeable. My problem is that browsing certain websites is extremely slow. The wireguard configuration contains a DNS Server entry which points to the local machine since I want ALL DNS queries to be resolved by the Pi-hole. I'm using cloudflared as DNS server (127.0.0.1:5053), however I've tried without running this as well to no difference. Pi-hole is running the latest version and conditional forwarding is turned off in the configuration. The VPN gateway is working fine and all my devices are using this device as gateway. Using wireguard + Mullvad instead of NordVPN.This guide pretty much sums up my setup however I've the following differences:

This device also functions VPN gateway / proxy for my network. I've setup and configured Pi-hole on a ODROID C4.

Mullvad slow