Choosing Between Forefront TMG or Forefront UAG for Publishing Scenarios

Your first decision when planning a publishing solution using Forefront TMG 2010 (TMG) or Forefront UAG 2010 (UAG) is to determine which of the two products best fits the needs of the deployment.

Both TMG and UAG can securely publish Exchange, SharePoint, Terminal Services and web-based line of business applications to the Internet. However TMG and UAG offer some features or support some scenarios that the other does not. So, the first step in choosing which product to use is deciding what features you need or think you may need.

Some deployments may actually benefit from using both TMG and UAG to satisfy specific requirements. For example, you might use UAG to provide a unified portal experience for your inbound Web-based client access, use TMG to protect Internet access for your internal users, and use Forefront TMG to provide certificate-based authentication to your mobile device-enabled workforce.

The following table compares both products at a functional level:

Feature or Capability	Forefront Threat Management Gateway 2010	Forefront Unified Access Gateway 2010
Scale Out Using Arrays Arrays enable you to apply the same configuration setting to multiple machines participating in the same array	X	X
Network load balancing of the publishing array Network Load Balancing (NLB) enables high availability and transparent failover for participants in the NLB array	X	X
Load Balancing of Back-End Servers Integrated Web Farm load balancing enables you to load balance connections to back-end web servers, removing the need for a hardware load balancer behind the web gateway	X	X
Single network interface deployment The web gateway can be deployed in a single NIC configuration, so that NICs do not span multiple networks	X
Enterprise Management (multiple nodes in one array) Enterprise Management enables the administrator to manage multiple arrays located throughout the organization from a single management interface; in addition, configuration for all arrays is stored in a centralized location which located off any of the array members	X
Integrated Windows Authentication Integrated Windows Authentication enables SPNEGO, Kerberos or NTLM authentication with the web gateway	X
Support two-factor authentication for web applications Two-factor (multi-factor) authentication enables the administrator to require users to present two or more pieces of information to access resources	X	X
Certificate Authentication with ActiveSync Certificate authentication with ActiveSync increases the overall ActiveSync security scenario by requiring the device to present a certificate before allow access to Exchange Server resources	X
Upgrade Path from ISA 2006 While it’s not possible to do an in-place upgrade from ISA to TMG (because ISA was 32bit only and TMG is 64bit only), there is a clear and easy to perform upgrade path.	X
Authorization Using Endpoint Policies Endpoint detection determines the state of the device connecting to the gateway and enforces access policy based on the results of the endpoint detection		X
SharePoint rich client support (MSOFBA) MSOFBA is a protocol that provides forms based authentication, instead of basic authentication, when you use Office client applications		X
Federation support with ADFS Use integration support for ADFS to enable federated identity scenarios		X
Endpoint Session Cleanup Endpoint session cleanup provides a mechanism to remove information obtained from the server during the course of the session; removal takes place on log off.		X
Port Scalability Port scalability enables you to publish more resources while using fewer ports on the receiving interface of the web gateway		X
Password Lockout Protection (at a node level) Password lockout protection protects the user account from being inadvertently locked out by either a friendly or malicious user; user is locked out of the gateway, but not in the Active Directory.		X
Granular access policies Granular access policies enable the administrator to control access to applications and to components of applications, based on the results of user and device assessments.		X
Support for DirectAccess DirectAccess is a new remote access technology that enables users to be always connected to the intranet and enables IT to always be connectivity to the users – all done transparently without user intervention		X
Portal functionality to publish multiple line-of-business applications Portal functionality enables users to connect to a single URL to access a portal page that contains applications and services available to the user, based on the results of user and device assessment.		X
Load balancing support for HTTP-based protocol access from the Internet Load balancing enables an array of web gateway to handle more requests more efficiently by evenly distributing connections among members of the load balanced array.	X	X
Highly Customizable Customizable according to the support guidelines and the development policies and processes for Microsoft partners		X
Built-in Wizards for Exchange Built-in wizard for publishing Exchange web services makes it simple to publish these resources using a secure default configuration	X	X
Outlook Web Access “Look and Feel” Both UAG and TMG provide a log on page experience that is similar to the one provided by Exchange Outlook Web Access (OWA).	X	X
Publish Microsoft Office Outlook Web App and the Exchange Control Panel (ECP) using forms-based authentication Forms based authentication enables users to enter credentials in an easy to use form to authenticate with the web gateway	X	X
Publish Outlook Anywhere using Basic or NTLM authentication	X	X
Publish Microsoft Exchange ActiveSync using Basic authentication	X	X
Support two-factor authentication for Exchange ActiveSync	X
Provide certificate-based authentication for Exchange ActiveSync, Outlook Web App, and ECP	X
Perform mail hygiene for Exchange with installation of the Edge Transport server role and Microsoft Forefront Protection 2010 for Exchange Server Email inspection can be performed on the web gateway to protect against spam and malware	X
Protect and filter Internet access for internal users from malware and other Web-based threats The web gateway can perform URL filtering to block undesirable web sites and scan and block malware delivered from the web	X
Provide support for scaled up Outlook Anywhere deployments by using multiple source IP addresses UAG has a Port Scalability feature that allows UAG to use multiple source IP address on its internal interface to contact the published CAS servers, allowing it to overcome the limit of 60000 ports maximum in a single IP address.		X
Check a client computer accessing Outlook Web App for presence of approved antivirus software, updates, etc. Endpoint detection can be performed to insure that the client attempting to access the OWA Exchange web service meets corporate security standards before allowing access		X
Built-in features for SharePoint publishing The web gateway has wizards and other technologies that make intelligent decisions on how to best publish SharePoint resources	X	X

Thanks to Fernando Cima and Carsten Kinder for developing this table.

HTH,

Tom

Tom Shinder
tomsh@microsoft.com
Principal Knowledge Engineer, Microsoft DAIP iX/Identity Management
Anywhere Access Group (AAG)
The “Edge Man” blog : https://blogs.technet.com/tomshinder/default.aspx
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