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Monday, April 21, 2008 5:00 AM

Context Channel Shapes

What channels can be used in a context binding? The primary limitation for building a context binding is that the channel stack has to have the right shape. The context exchange protocol used by a context binding requires that the first invoked operation
Posted by Nicholas Allen | 1 Comments
Thursday, April 17, 2008 5:00 AM

Why Dual is Reliable

You may have noticed that bindings use two different classes for configuring reliability: ReliableSession and OptionalReliableSession. The only difference between the two is that OptionalReliableSession has an Enabled property that allows the reliable
Posted by Nicholas Allen | 1 Comments
Tuesday, April 08, 2008 5:00 AM

Default ProtectionLevel for Standard Bindings

Previously I've described how messages are protected by using the ProtectionLevel attribute to specify the minimum level of protection. If you don't specify a protection level explicitly, then you'll get one by default that is computed based on the binding.
Posted by Nicholas Allen | 1 Comments
Friday, March 28, 2008 5:00 AM

Overriding Protection for IPSec

How do I use username credentials with IPSec? I'm told that I need to turn on security but my connection is already secure. WCF only permits username tokens to be transmitted over a binding that's secure. If a username and password are transmitted without
Posted by Nicholas Allen | 2 Comments
Thursday, March 13, 2008 5:00 AM

Partial Trust Binding Black List

Partial trust support in WCF is an Orcas feature that allows clients and services to be run in an environment with restricted permissions. WCF is part of a fully trusted installation, so by default partially trusted callers are not allowed to call into
Posted by Nicholas Allen | 1 Comments
Monday, December 31, 2007 5:00 AM

Mapping Credentials to Authentication Schemes

You may have noticed that an HTTP binding is configured with an HttpClientCredentialType whereas an HTTP binding element is configured with an AuthenticationScheme. How are these two settings related? If you want to switch between a custom binding and
Posted by Nicholas Allen | 3 Comments
Monday, December 10, 2007 5:00 AM

Deriving from Bindings

When packaging up a collection of settings, how do I know whether to use a CustomBinding, extend the Binding class, or extend one of the standard binding classes? In most cases this should be easily decidable by asking at most two questions. The first
Posted by Nicholas Allen | 1 Comments
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Friday, August 17, 2007 5:00 AM

Supporting Multiple Security Mechanisms

How do I write a service that gives clients the option to choose between different security mechanisms for protecting a service call? For example, how can I allow clients to choose between certificates and passwords? I think that if the example choice
Posted by Nicholas Allen | 3 Comments
Wednesday, April 11, 2007 5:00 AM

Interfaces for GetProperty, Part 2

I've done a bit of grouping for the remaining binding elements as there are fourteen non-transport binding elements that I'm covering in this list. I've pointed out the ones that respond to a type with GetProperty on the base class as opposed to repeating
Posted by Nicholas Allen | 1 Comments
Tuesday, April 10, 2007 5:00 AM

Interfaces for GetProperty, Part 1

This is more of a reference than anything else. People have asked me what interfaces do something when used with GetProperty on a binding element. Of course, a custom implementation can do whatever it wishes in its GetProperty, so I can only tell you
Posted by Nicholas Allen | 1 Comments
Wednesday, April 04, 2007 5:00 AM

Optional Interfaces on Binding Elements

In the past I've talked a lot about the absolute minimum you need to do to write a working channel. However, what about the people that want all of the optional bells and whistles that can go along with channel development? There are several interfaces
Posted by Nicholas Allen | 2 Comments
Friday, March 23, 2007 5:00 AM

Preventing Anonymous Access

How do I prevent clients from accessing my service anonymously? I've changed the settings in IIS from Anonymous Access to Integrated Windows Authentication. However, now I'm getting the error message: "Security settings for this service require 'Anonymous'
Posted by Nicholas Allen | 3 Comments
Thursday, March 22, 2007 5:00 AM

Responding to GetProperty

I've created a custom implementation of GetProperty for my binding but now I'm getting errors when I go to use the channels. Why is the validation for these channels failing? This is an implementation problem that I've talked about in the past. There
Posted by Nicholas Allen | 1 Comments
Monday, March 19, 2007 5:00 AM

Channel Bindings

We're back to the channel development tour for another pair of articles. Today's article is the first of four in this segment on channel construction. The first half of the segment is background and the second half of the segment talks about code. In
Posted by Nicholas Allen | 3 Comments
Friday, February 02, 2007 5:00 AM

Bindings for Workgroups

What's the fastest binding for securely communicating over an intranet? How about if the client and server don't share a domain? A lot of attention gets paid to Internet configurations, where HTTP rules the world. HTTP is so dominant in that environment
Posted by Nicholas Allen | 3 Comments
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