Network Security
Polycom®, Inc. 571
Business to Business Connections
The following Business to Business connection call flow options are supported:
FW (Firewall) NAT Keep Alive
The Collaboration Server can be configured to send a FW NAT keep alive message at specific Intervals for
the RTP, UDP and BFCP channels.
This is necessary because port mappings in the firewall are kept open only if there is network traffic in both
directions. The firewall will only allow UDP packets into the network through ports that have been used to
send packets out.
By default the Collaboration Server sends a FW NAT Keep Alive message every 30 seconds. As there is no
traffic on the Content and FECC channels as a call begins, the firewall will not allow any incoming packets
Business to Business Connections
Enterprise A Client Enterprise B Client
Environment Registered SBC SBC Registered Environment
H.323 Yes RealPresence
Access
Director
RealPresence
Access
Director
Yes H.323
H.323 Yes VBP Yes H.323
SIP Yes RealPresence
Access
Director
RealPresence
Access
Director
Yes H.323
SIP Yes Acme Packet Acme Packet Yes H.323