Thank you so much - this was exactly what I needed, and I wasn't even looking for it! I've been using one of the Warzone specific VPN services on my PC and that worked okay, but I felt more and more the algorithm must detect all of those accounts using the same few IPs to connect, some lobbies were.. strange.
But now I can use my own VPN and also use it on console! Works perfect, just tested it on a PS4. Only note is that you need to change the type of device in Netduma to PC, if it's Playstation it will not let you alter the mode / use "add service".
PS: How did you figure out the exact ports if I may ask? Via a tool like Wireshark?