Port Requirements for Lync 2010 Application sharing with external user

For Small buisness network this topic may not be that much usefull,but for a Large enterprise with restricted network setup this will be very usefull.Below requirements i captured using lot of testing and network tracing.When i recieved this requirement there was no articles clearly mentioned about how we can achieve this,all was mentioned some specific ports for application wise.

Scenario:Users are sitting in a restricted network.User only have text IM access with othere users as well as federation/external users.Requirement here is to application sharing with external/federated users.After the study i concluded with below ports for application sharing with external users.

Public to edgeserver:

TCP/443

UDP/3478

TCP/8057

TCP/50,000-59,999 (Outbound only)

From the internal Client to the internal Edge:

TCP - 443
UDP – 3478

Above ports for only to conference and Media traffic from internal user to External user.

If you wanted to have internal conference between 2 restricted netwok users below is the port requirements.

Client to Front End Pool

UDP		49152 to 57500
TCP		8057
TCP		443
TCP		49152 to 65535
TCP		448

Client to AV Pool

UDP		49152 to 57500
UDP		57501 to 65535