@startuml
skinparam shadowing false
title Before: heartbeat leaves through the home box

node "Master\netmaster.net:27950" as master
node "Home box\n86.x.x.x" as box
node "Front\n74.208.250.147" as front
node "ET server\n10.0.1.103:27960" as et

et --> box : heartbeat
box --> master : heartbeat (source = home IP)
master --> box : getChallenge\n(to home IP: dropped)
front ..> et : players (DNAT + wg + nginx stream)
@enduml