<div>
I have much to learn before I follow this up.<br />
Thanks for your time!
</div>


I have much to learn before I follow this up.
Thanks for your time!

<div>
<div class="content wysiwyg-content">
My client cannot remotely access his Small Business Server from home using VPN. &nbsp;He has these error messages: &nbsp;&quot;Remote firewall blocked TCP Port 1723&quot;
</div>
</div>


My client cannot remotely access his Small Business Server from home using VPN.  He has these error messages:  "Remote firewall blocked TCP Port 1723"

How do I open TCP Port 1723 to allow VPN?

A virtual private network (VPN) is a network that uses a public telecommunication infrastructure, such as the Internet, to provide remote offices or travelling users access to a central organizational network securely. VPNs encapsulate data transfers using secure cryptographic methods and other security mechanisms to ensure that only authorized users can access the network and that the data cannot be intercepted.

Small Business Server (SBS) is a line of server operating systems targeted at small businesses by bundling the operating system with a number of other Microsoft products that would normally need to be purchased or licensed separately. The most notable inclusions are Exchange, SQL Server, SharePoint and ISA/TMG (Microsoft's firewall and proxy server).

Microsoft Forefront, formerly known as Internet Security and Acceleration Server (ISA Server), is a network router, firewall, antivirus program, VPN server and web cache that runs on Windows servers. It includes identity management and protection systems, and discontinued systems for threat management and network protection, along with protection for Sharepoint and Exchange. The scope of discussions includes forward and reverse proxy, application and service publishing, virtual private networks (VPNs), outbound access rules, SSL certificates and network routing within either a single node or an highly-available array pairing.