The Microsoft Patterns and Practices team has created a guide for WCF security. http://blogs.msdn.com/jmeier/archive/2008/03/27/patterns-and-practices-wcf-security-guidance-now-available.aspx You can find more information at the root site http...

When working with IIS 7.0 in Vista if you are seeing this failure trying to access the webserver, there are couple of things to look for. 1. Check if the Application Pool is running. You can click on the Application Pools option on the Left Pane of...

One of the things that have come up many times is how the service could stop a client from retrying a request for a valid security validation error while Reliable Messaging is enabled. If you are not familiar with the situation the essence of the problem...

Federation Clients might have scenarios where it is talking to a Service and STS that don't have the same trust version. The Service WSDL can contain a RequestSecurityTokenTemplate with Trust elements that are in different version than the STS. In these...

SOAP 1.1 defines the attribute "actor" that can be on any SOAP header which will indicate who the ultimate processor of the header is going to be. It also defines a standard URI value for this actor attribute that is " http://schemas.xmlsoap.org/soap...

There has been a lot of interest around this and hence I have attached some code listing to this post. Check it out!

If you are using WSE and are a VS developer, you would be familar with the WSE Visual Studio Addin that automatically generates WSE Proxy when a Web Reference is added to the project. But if you are a developer in 64-bit machine you will not have this...

If you are using Visual Studio 2005 below is how you can enable intellisense to edit your WCF config files. Copy the Attached WCF Configuration schema file to your VS installation folder at %Program Files%\Visual Studio 8\Xml\Schemas. You will find...

If you had a Beta version of Framework 2.0 installed on your machine and are moving to a the RTM version, then you might have some trouble with getting the correct version of mscoree.dll in place. The reason is Microsoft Installer's resilence feature...

I had a question today from a customer who was concerned that his WCF application might start to behave erratically due to the new Daylight savings schedule. Then I realized that there has been quite some noise around this area and people are predicting...

I have discussed about Federation before. This post discusses Federation from the active context. "Active" means that the client is a smart client capable of doing encryption and signing and can actively participate in the Federation protocol. There are...

When you are using a X.509 Certificate as the client authentication token in Mixed-Mode Security - apart from signing the Timestamp WCF will sign the 'To' header as well. This is to prevent a client spoofing attack by a rougue service. Consider the situation...

WCF supports three types of Security. They are, Transport Security Mixed-Mode Security Message Security Let's discuss the various Security Modes below. Transport Security is applied at the transport byte stream below the message layer...

If you are confused looking at the IIS 7.0 UI, you are not alone. I recently had to configure SSL on a IIS 7.0 and had quite some guessing work before I could get it to work. Below documents the procedure required to do this, Open IIS Manager and...

There are four different security header layout that can be specified in WCF. The values are defined in WS-SecurityPolicy. They are, Strict - All security tokens are defined in the security header before its first use. The primary signature should...

In a nutshell, .NET Compact Framework 3.5 supported features for WCF include: messaging-layer communication, WS-security, and http and mail transports. All of these a subsets of what the desktop supports, with the exception of the mail transport, which...

Hosting a WCF service on a HTTP endpoint on Windows Vista has some issues given that you are not running with Administrator privileges. Following blogs discusses how to get around this issue, http://blogs.msdn.com/drnick/archive/2006/10/16/configuring...

The latest WS-Trust spec (yet to be ratified by OASIS) introduces a concept called Bearer Tokens. This basically is a keyless token that a client requests from an STS (Security Token Service). The only purpose this token serves is to provide more information...

Below is the link to RTM documentation for .NET 3.0 http://msdn2.microsoft.com/en-us/library/aa388579.aspx

Windows Vista was signed off today to RTM. Windows Vista will release with Office 2007 on November 30th. http://news.com.com/Microsoft+Vista+is+ready+to+roll/2100-1016_3-6133660.html

Get the latest version of .Net Framework 3.0 at http://www.microsoft.com/downloads/details.aspx?FamilyId=10CC340B-F857-4A14-83F5-25634C3BF043&displaylang=en

It is official now. Vista and Office 2007 will release for bussinesses on Nov 30. So the consumer launch will make the promised Jan 2007. http://seattlepi.nwsource.com/business/290809_msftvista02.html

There has been enough posts on this topic. But this topic cannot be over emphasized. The best way to debug any WCF issue is to get a complete Message log and trace. We write tons of information to the trace that there is very little (if any) issues that...

Microsoft shows off Vista packaging. What is inside is much more exciting. :-) So...are you ready for Vista? http://www.tgdaily.com/picturegalleries/gallery-200610311-5.html

In a Federation Scenario a client might want to access the services by using a SAML token that was issued to it by a STS. The service in turn might have to call other services (like a intermediary) to fulfill the request. When calling the backend service...