@limited-psychiatrist-6170 you do need to enable udp hole punching on each client, or alternatively port forward to your machine. If forwarding, you'll need a different IP for each additional machine on the same LAN (e.g. 51822). And for Windows, a reboot is still needed on occasion and is always worth a shot if you're looking for the effects of any changes. Don't forget to add the network range in Windows Firewall as well.