VoIP has become the standard for voice communication over IP networks. VoIP allows voice and data traffic to be processed on a single network making more efficient use of the already existing infrastructure. Currently the Barracuda NextGen Firewall F-Series supports three different types of Voice over Internet Protocols (VoIP).
SIP is the most widely used VoIP Protocol. Use the SIP proxy on the Barracuda NextGen Firewall F-Series to enable VoIP transmissions trough the firewall. The legacy SIP firewall plugin is also included, but Barracuda Networks recommends using the newer SIP proxy.
SCCP is a proprietary VoIP standard now owned by Cisco Networks. SCCP uses a SKINNY signaling connection and dynamic RTP connection for data transmission (audio, video, ...).
For more information, see How to Configure VoIP Connections with the Skinny (SCCP) Firewall Plugin.
H.323 is a protocol that defines communication (audio and video) in any IP based network. The Barracuda NextGen Firewall F-Series acts as a H.323 neighbor gatekeeper.
For more information, see How to Configure the H.323 Neighbor Gatekeeper.