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In this part we extend, slightly, upon the previous scenario, by adding delegation. Now we need to allow IIS, in our resource Forest (or domain) to delegate the end user’s credentials, to a backend service (SQL Server in this case):The machines this case are:MachineDomainIP ...

Note: I have created a list of all the IIS and Kerberos parts  I'm finally getting around to writing this section on IIS and Kerberos. This initial post will cover the basics of a cross-Forest Kerberos authentication scenario. In the next few posts we'll cover more complex situations including delegation and ISA Server ...

Hi all, There are two security patches out this month for IIS. The first (MS08-005) affects Windows XP x86 (IIS 5.1), Windows XP x64 (IIS 6.0), Windows Server 2003 (IIS 6.0) and Vista RTM (IIS 7.0). Vista SP1 and Windows Server 2008 are not affected. This is a local escalation of privilege vulnerability, and requires that the attacker be ...

Having just deployed a test Operations Manager 2007 server at home, I wanted to publish the Web Console site externally, so I wouldn't have to continually TS into my box at home, and use the regular console. My only problem is that I have a single public IP address, and because I'm only publishing services over HTTPS, I only have a single ...

Protocol Transition is a new feature in Windows Server 2003. The Kerberos implementation in Windows Active Directory domains provides the robustness of Kerberos whilst also obviating a number of the technical issues with non-Windows Kerberos implementations (platform infrastructure, ticket renewal, ticket proxy). However Kerberos has a downside ...

I was asked recently by a colleague if a website defined in IIS could have multiple SSL certificates installed, so that the website would answer requests for https://www.abc.com as well as https://www.def.com without generating an error in the user's browser that the website's name didn't match the one in the certificate. The simple ...

Unfortunately if you have a new Vista PC, and you try to use the web enrollment pages (certsrv) hosted on a Windows Server 2000 Certificate Authority (CA) or a Windows Server 2003 CA, you won't be able to enrol for a certificate (indeed if you're using Windows Server 2003 SP2 you get a message to that effect). If you are in a domain ...

Delegation is a feature of Kerberos authentication that allows a server to obtain a Kerberos ticket on behalf of an end user without ever having access to the end user's password. This functionality allows Kerberos to solve typical "double-hop" authentication problems where a user's credentials need to flow through multiple ...

In Part 3 of this series we look at setting up Kerberos Authentication in the simplest possible scenario. If you missed Parts 1 (What is Kerberos and how does it work) and 2 (Service Principal Names) they may be worth reading first. In this scenario, we have a client, a DC and a single IIS server. As we progress through the series, we will ...

Apologies for the delay in posting Part 2 - I've been on holidays so it's been a bit hard finding the time to write these posts. In this part we cover Service Principal Names (SPNs).  In a previous post we covered the basics of Kerberos authentication. Everything is relatively straitforward, however I didn't cover the one ...