How to change public port of jitsi videobridge

hi Damian Minkov,
I build a jitsi system with 3 video brigde server, i have only one IP public, when i public my system, i using NAT method (NAT Port) for NAT port ip private to port ip public. Can you help me how to change default port of videobrigde which face to users (443, 10000 udp) to resolve my problem about limit of ip public.
thank you very much.