Microsoft Lync Desktop Sharing Issue with Palo Alto

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Microsoft Lync Desktop Sharing Issue with Palo Alto

L0 Member

Recently we upgraded our PAM to 7.0.5 and since then we are receiving Intermittintly Desktop sharing failure request.

Do you have recomandation?

3 REPLIES 3

L4 Transporter

Cyber Elite
Cyber Elite

Balullag, 

Are you using the actual Microsoft Lync on-premise server or the online hosted solutiion? 

L1 Bithead

Seems to have been a bug n the Palo Alto software that doesn’t recognize the desktop sharing session as that, but tries to decrypt the session that I don't believe has been fixed because we are having the same issue (PAN OS 7.1.x) and are about to implement the following as a potential workaround.

 

from the article: https://blog.codesalot.com/2015/09/28/desktop-sharing-issues-with-palo-alto-firewalls/

 PAN support gave this workaround:

 

Create a custom application for port 443

customapp

Create an application override for port 443

appoverride

Create a policy

policy

 

This has solved the issue for us.

 

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