mullvad-best-server

Determines the mullvad.net server with the lowest latency.

Installation

Download binary from releases for your platform and unpack.

Usage

Default usage

Execute mullvad-best-server. It outputs the code, e.g. de05. You can then connect to it with e.g. wireguard using the normal shell scripts.

Command line parameters

Usage of dist/mullvad-best-server_darwin_amd64/mullvad-best-server:
-c string
  Server country code, e.g. ch for Switzerland (default "ch")
-o string
  Output format. 'json' outputs server json
-t string
  Server type, e.g. wireguard (default "wireguard")

If you want the full server information, execute mullvad-best-server -o json. It returns the full json output of the server information. The -c flag allows to give a country code. Else ch will be used.

Background

The program uses https://api.mullvad.net/www/relays/<SERVER_TYPE/ to get the current server list, pings the ones with the right country and outputs the server with the lowest ping.

Integration into a script

I use it on my router like this (yes, I know I could have done the whole thing with jq and shell scripting, but wanted to use go for maintainability).

#!/bin/sh
set -e
LATEST_RELEASE=$(curl -sSL https://api.github.com/repos/bastiandoetsch/mullvad-best-server/releases/latest | jq -r '.assets[]| .browser_download_url' | grep Linux_arm64)
curl -sSL $LATEST_RELEASE > /root/mullvad-best-server
chmod +x /root/mullvad-best-server
/usr/bin/wg-quick down $(wg show|grep interface | cut -d: -f2)  || echo "nothing to shut down"
/usr/bin/wg-quick up "mullvad-$(/root/mullvad-best-server -c de)"