graph { flow: up; }

[ Client ] { origin: Proxy; offset: 0,2; } <--> [ Proxy ] { size: 3,2; }
[ Client1 ] { origin: Proxy; offset: 0,-2; } <--> [ Proxy ]
[ Client2 ] { origin: Proxy; offset: 2,0; } <--> [ Proxy ]
[ Client3 ] { origin: Proxy; offset: -2,0; } <--> [ Proxy ]
