Vidyo VidyoGateway Administrator's Manual page 180

Appendix D. NAT/Firewall Traversal
5. The VidyoGateway sends a connect message to the Legacy device. Capabilities are
exchanged between both devices. Video and audio is negotiated and sent between the
two systems.
The following diagram illustrates an H.323 firewall configured with a STATIC NAT.
192.168.1.110
(private address)
TCP 1720: Call setup (H.323)
UDP 5060: Call setup (SIP)
TCP 1024 – 65535 (H.245 call parameters)
VidyoGateway
UDP/RTP 1024 – 65535 (video and audio)
UDP/RTCP 1024 – 65535 (video and audio)
UDP/RTP 1024 – 65535 (data/FECC)
UDP/RTCP 1024 – 65535 (data/FECC)
These are the port requirements between the VidyoGateway and Legacy devices:
Port(s)
53
1718
1719
1720
5060
(configurable)
5061
(configurable)
1024 – 65535
Private
Type
UDP
UDP
UDP
TCP
UDP/TCP
TLS
Dynamic TCP
TCP 1720: Call setup (H.323)
UDP 5060: Call setup (SIP)
TCP 1024 – 65535 (H.245 call parameters)
UDP/RTP 1024 – 65535 (video and audio)
UDP/RTCP 1024 – 65535 (video and audio)
UDP/RTP 1024 – 65535 (FECC)
UDP/RTCP 1024 – 65535 (FECC)
Description
DNS
H.323 gatekeeper discovery
H.323 gatekeeper registration
H.323 call setup
SIP call signaling
SIP call signaling
H.323 Call control (H.245)
Note The H245 port range is
configurable. It should be set
to at least four times the
number of simultaneous H323
calls in the cluster.
174
Public
200.100.50.25
(public address)
Legacy
Device
Direction