topic Re: Microsoft Lync Desktop Sharing Issue with Palo Alto in General Topics

Microsoft Lync Desktop Sharing Issue with Palo Alto

BaluIlag — Sat, 30 Jul 2016 18:07:05 GMT

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

Do you have recomandation?

Re: Microsoft Lync Desktop Sharing Issue with Palo Alto

_slv_ — Fri, 05 Aug 2016 15:13:11 GMT

Hello

Did You read topic https://live.paloaltonetworks.com/t5/Management-Articles/FAQ-Office-365-Access-Control/ta-p/94949 ?

Regards

SLawek

Re: Microsoft Lync Desktop Sharing Issue with Palo Alto

BPry — Fri, 05 Aug 2016 16:00:28 GMT

Balullag,

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

Re: Microsoft Lync Desktop Sharing Issue with Palo Alto

Mike.ship — Wed, 23 Aug 2017 18:18:52 GMT

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

Create an application override for port 443

Create a policy

This has solved the issue for us.