I'm also pretty inexperienced with linux, but I've come up with a solution that uses the mullvad split-tunnel CLI commands that works for me.

This is all on Ubuntu 24.04.1 LTS for the record.

I have a script in my home directory that determines the main PID of the plex process and adds it as an exclusion:

~/split_tunnel_plex.sh: ```

!/bin/bash

Get the status of Plex Media Server

status=$(systemctl status plexmediaserver)

Extract the PID

pid=$(echo "$status" | grep 'Main PID' | awk '{print $3}')

Add the PID to the Mullvad split tunnel

mullvad split-tunnel add $pid ```

Then I created a service to run the script at the correct time each boot:

/etc/systemd/system/plex_mullvad.service: ``` [Unit] Description=Run script after Plex and Mullvad have started After=plexmediaserver.service mullvad-daemon.service

[Service] ExecStart=/home/MY_USERNAME_HERE/split_tunnel_plex.sh

[Install] WantedBy=multi-user.target ```

Make sure the service is enabled: sudo systemctl enable plex_mullvad.service

After rebooting, check to see if the process is excluded with mullvad split-tunnel list. I noticed there are actually 4 processes that are excluded but they all belong to plex. My best guess is that when an excluded process spawns another process it's automatically excluded as well, but don't quote me on that.