topic Re: Lync Federation Traffic in General Topics

Lync Federation Traffic

bradcl_15 — Fri, 02 Oct 2015 01:14:44 GMT

Hi Guys,

Recently we've configured Lync 2013 on our network.

What i've noticed on the PA external firewall is the Lync federation traffic from the internal lync clients to for example 'Skype clients' on the web or other organizations is classified on the PA as 'unknown-tcp'... on port 443.

Currently i've got a security policy purely allowing 'unknown-tcp' on port 443... but this isn't all that secure.

Is there a workaround for this? or is this apart of lync that Palo Alto haven't developed an App-ID for yet?

Cheers,

Brad

Re: Lync Federation Traffic

Raido_Rattameister — Mon, 05 Oct 2015 13:33:01 GMT

Hi,

Is this traffic to other Lync/Skype clients or to MS servers?

List of MS servers can be found here:

https://support.office.com/en-us/article/Office-365-URLs-and-IP-address-ranges-8548a211-3fe7-47cb-abb1-355ea5aa88a2?ui=en-US&rs=en-Us#BKMK_EXO

Cheers,

Raido

Re: Lync Federation Traffic

bradcl_15 — Tue, 06 Oct 2015 00:24:01 GMT

Hi,

The traffic seems to be heading to MS servers in the 64.4.0.0/18 range... which isn't outlined in that URL.

I think this range is a MS Skype range.

Cheers,

Brad