If a Director isn??™t deployed, this authentication is performed by the
Front-End Server on the pool or on a Standard Edition server that you??™ve designated
to do so. Edge servers don??™t have Active Directory access because they??™re
deployed in the perimeter network outside Active Directory. If you??™re using
conferencing, remote user access, federation, or public IM connectivity in your
enterprise, you must have an Access Edge Server.
?– Web Conferencing Edge Server In relatively simple terms, the Web
Conferencing Edge Server enables data collaboration with external users. It proxies
Persistent Shared Object Model (PSOM) traffi c between the Web Conferencing
Server and the external clients. The Web Conferencing Edge Server has to approve
any traffi c from outside the domain before it ever sees it. The Web Conferencing
Edge Server requires users outside the domain to use TLS connections and to
obtain a conference session key.
?– A/V Edge Server This server provides a single trusted connection point
where both inbound and outbound media traffi c can securely cross NATs and
fi rewalls. Basically, it enables audio conferencing and videoconferencing and
A/V peer-to-peer communications with external users who are equipped with
the MOC 2007 client. Peer-to-peer communications travel between the clients
and don??™t go through the A/V Conferencing Server. ICE is the industry-standard
solution for multimedia traversal of fi rewalls. ICE is based on the Simple Traversal
Underneath NAT (STUN) and Traversal Using Relay NAT (TURN) protocols.
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