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Block Skype File Transfer outside the network

Hello !!

 I want to monitor/block file transfer via skype for business  (desktop client) and skype (desktop client),whereas chat should be allowed.

Currently I'm using Application File Access Protection rule, which is helpful to some extent.. But it can not block file transfer outside domain.

While searching for the solution came across Network Communication Protection Rule (NCPR).

Classification : 
End-User : 
Network direction:
Network addresses:
Network ports :
Application creating the connection:

HELP !! regarding Network Addresses: what should be the address

and for skype and skype for business if we port use 80/443 then it might block network traffic.. because other traffic might be dependent on 80/443.

Confused !! Can someone help with configurations ???

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Re: Block Skype File Transfer outside the network

If you say about Network Communication Protection Rule, I can say the following:

If you put a lock function of the network connection, then the rule is triggered to protect the network connection is blocked until the end of the work blocked the application (program).

This feature DLP Endpoint, and here we can not do anythingIf you want, we can request a revision, because I like it a lot is not satisfied.

About blocking Skype: Most likely you have set incorrectly self-protection rule:
1. Skype creates a bunch of network connections, for example, if you block him sending messages, it will send a bunch of messages on different network ports. First on the 443, then at 43HHH, 33033 and so on.

2. These compounds are generated every second (on average), so if you block the network connection, then "drown" in a large number of messages on the console DLP.

I can suggest a few options:
1. Monitoring sending-receiving files over AFAPR.

2. Copy the entire database when you run Skype on Skype endpoint computer. And then hand-database search with the help of other programs.

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