How to Publish Lync Server 2010 URLs with Forefront TMG 2010

March 13, 2010 by Thomas Foreman in General

We have been working to get our new Lync Server 2010 set up, and we are using Forefront TMG 2010 as our firewall. I thought I would share how we got the Lync Server 2010  meeting URLs published through Forefront TMG 2010.

Note: This is not how to publish Lync Server VOIP through TMG, that is still not supported.

Here is some background information about our deployment.

We have a Forefront TMG 2010 configured as our gateway, and one Lync Server 2010 (RC) server with the collocated Mediation server.

We have set our Lync Server meeting and dial-in URLs to be:

Simple URLs

We have also used port redirection for external web services to 4443 for these URLs.

Web Services

We have created DNS A records for meet and dialin on our public DNS server.

In Forefront TMG 2010, we created one Non-Web Server Publishing rule using the New Server Publishing Rule Wizard:

New Server Publishing Rule

Next, on the Select Server page, we typed the internal IP address of our Lync Server:

New Server Publishing Rule IP

Then on the Select Protocol page, from the Selected protocol: drop-down list, we selected HTTPS Server, and then clicked Properties:

New Server Publishing Rule HTTP

On the HTTPS Server Properties page, under Application Filters, we verified that none of the filters are selected.

Web Server HTTP Properties

Back on the Select Protocol page, we clicked Ports. Then on the Ports dialog box, under Published Server Ports, we selected Send requests to this port on the published server, and then typed 4443.

Lync Server Ports

This will redirect the HTTPS traffic coming in on port 443 to the internal URL on port 4443. On the Network Listener IP Addresses page, select External, and then Address.

New Server Publishing Rule Listener

On the External Network Listener IP Selection page, select the specific IP address for your Meet and Dialin URLs.

External Network Listener Selection

On the completion page, click Finish.

Lync Server Publishing Rule

After the rule has been created, right-click the rule, click Properties, and then click the To tab.

On the To tab, click the Requests appear to come from the Forefront TMG computer option, and then click OK to apply the changes.

Lync Server Request for Published Server

Now, when our users are external, or federated, or anonymous users try to join our Online meetings, they can connect. Also, external users can now go to the Dial-in Conferencing Settings page.

As a final note, we had the new configuration working with this final setting set as Requests appear to come from the original client too. We would love some feedback if anyone has any.

Thanks to Brian Ricks ( for his help with this.

I hope this helps!

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