[Serusers] NAT Question

[O-Zone]

Hi all,
i've SER Server in out INTRANET with IP 192.168.1.2. On our router/Firewall i 
forward all UDP's to this server (D/SNAT) and REGISTRATION of extrernal users 
WORK. But AUDIO don't. I need something like STUN server ?

Thanks ! Oz

P.S. External i mean users outside our Intranet

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