Comprehension Digest and Advanced Digest Authentication in IIS 6.0 .


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Understanding Digest and Advanced Digest Authentication in IIS 6.0. Chris Adams Web Platform Supportability Lead Microsoft Corporation. Introduction to Authentication Defining Digest Authentication Digest vs. Advanced Digest Digging deeply into Digest Auth
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Slide 1

Understanding Digest and Advanced Digest Authentication in IIS 6.0 Chris Adams Web Platform Supportability Lead Microsoft Corporation

Slide 2

Introduction to Authentication Defining Digest Authentication Digest versus Propelled Digest Digging profoundly into Digest Auth Digging profoundly into Advanced Digest Summary Agenda

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Introduction to Authentication What is confirmation? What is approval? Confirmation versus Approval 401.1 versus 401.3

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How confirmation works in Microsoft ® Internet Information Services (IIS) Introduction to Authentication Request enters server center Server center advances to anonymous supplier. IIS manufactures path (w3svc/1/root) and confirms if unknown is empowered . Yes: Provide way and Anonymous clients token to approval director No: IIS passes the way to each provider to figure out whether path has that supplier empowered. Every supplier that is empowered comes back to Server center the suitable header. Mysterious Basic Server Core Kerberos NTLM Digest Passport

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Server Core Introduction to Authentication How confirmation functions in IIS WWW-Authenticate Digest Adv. Process

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Defining Digest Authentication Digest Authentication is an industry standard for every Requests for Comments (RFC) 2617 For IIS heads and engineers, Digest is accessible on these stages: Microsoft ® Windows ® 2000 and IIS 5.0 Microsoft ® Windows Server™ 2003 and IIS 6.0 Why enthusiasm for Digest? Watchword is secured, not sent on wire in "clear content" Digest is enhanced for Windows ® areas

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Digest versus Propelled Digest, accessible on Windows 2000 Server and Windows Server 2003, requires the accompanying: Relies on specialist procedure to keep running as Local System Uses the IIS Sub-Authenticator (iissuba.dll) In Windows Server 2003, UseDigestSSP must be set to "false" Requires Microsoft ® Windows ® Active Directory ® User\'s secret word must be put away with Reversible Encryption empowered Calculates hash on the fly and transmit over the wire

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Digest versus Propelled Digest (2) Advanced Digest Not accessible on Windows 2000 Implemented in center validation supplier in LSASS (not depending on IIS Sub-Authenticator) Hash is put away as property of client in Windows Server 2003 Active Directory Is default Digest Authentication on clean introduces of Windows Server 2003 Metabase property UseDigestSSP must be set to "genuine"

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Digest versus Propelled Digest (3) Key How it customers are verified utilizing Digest 200 OK Status 401.1 Login Failed with a WWW Authenticate header IIS Sends Hash to Domain Controllers Active Directory 401.2 with WWW-Authenticate: Digest:Realm User Hash (Username, Password, Realm) IIS

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Digest versus Propelled Digest (4) Key How it customers are confirmed utilizing Digest 200 OK Status 401.1 Login Failed with a WWW Authenticate header IIS Sends Hash to Domain Controllers Hash pre-processed and put away in Active Directory Active Directory 401.2 with WWW-Authenticate: Digest:Realm User Hash (Username, Password, Realm) IIS

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Digging Deeply Into Digest Authentication has one of a kind attributes that give clients challenges Local System: Non-issue on Windows 2000 in light of the fact that it utilizes iissuba.dll and it keeps running as a part of Inetinfo Reversible Encryption: Users secret word must be put away with less security in Active Directory

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Digging Deeply Into Digest How is IIS Sub-Authenticator empowered? Open a Command-Prompt, sort: rundll32 systemroot\system32\iissuba.dll,RegisterIISSUBA (Case Sensitive) Ensure Local System Default for Windows 2000 Running as Local System is a Bad Security Practice Windows Server 2003

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Demonstration One Enabling Digest Authentication in Windows Server 2003 The objective is to show how heads and engineers can effectively empower Digest

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Digging Into Advanced Digest Advanced Digest is ONLY accessible in Windows Server 2003 and IIS 6.0 Advanced Digest is executed in LSASS where all other confirmation sorts are performed Advanced Digest is consistent with the Digest RFC There is no UI for Advanced Digest it\'s empowered utilizing a summon line Property = UseDigestSSP

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Digging Into Advanced Digest (2) Advanced Digest depends on a pre-registered MD5 hash put away in Active Directory Stored in the same place as Kerberos hashes MD5 hash is put away as different passages: User@Domain - Ex: user@contoso Domain\User – Ex: contoso\user User@domain (UPN) – Ex: user@contoso.local Is this property secure in Active Directory? Yes, no client including Domain Admins have admittance to where the hash is put away Only Local Security Authority (LSA) has entry to this hash data It is put away on the DC and never is sent off the DC

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Digging Into Advanced Digest (3) Limitations of Advanced Digest to date Microsoft ® Internet Explorer 6.0 SP1 does not handle propelled process asks for appropriately For every demand per association, Internet Explorer prompts the client for certifications This is being altered in Windows Server 2003 Service Pack 1 2004-09-16 12:06:21 127.0.0.1 GET/iisstart.htm - 80 WS03EE\Administrator 127.0.0.1 200 0 2004-09-16 12:06:22 127.0.0.1 GET/pagerror.gif - 80 WS03EE\Administrator 127.0.0.1 200 0 Same Connection – Prompt for each Get

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Demonstration Two Enabling Advanced Digest Authentication in Windows Server 2003 The objective is to exhibit how chairmen and engineers can effectively empower Advanced Digest

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Session Summary Digest takes after the RFC standard 2617 Windows 2000 offers Digest confirmation just Windows Server 2003 offers Digest and Advanced Digest validation Clients get in WWW-Authenticate header "Process" and Realm for both Digest and Advanced Digest requires the IIS Sub-Authenticator Advanced process stores all data in Active Directory for every client and is executed in LSASS

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References and Resources IIS 6.0 Help: Digest: http://www.microsoft.com/assets/documentation/iis/6/all/proddocs/en-us/sec_auth_digestauth.mspx Adv. Process: http://www.microsoft.com/assets/documentation/iis/6/all/proddocs/en-us/sec_auth_advdigestauth.mspx KB Articles: IIS 6.0 Resource Kit IIS Forum: http://www.asp.net/discussions IIS Answers: http://www.iisanswers.com IIS Frequently Asked Questions (FAQ): http://www.iisfaq.com IIS Resources: http://www.iis-resources.com

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Get Up to Speed on .NET Get Trained on Microsoft Developer Technologies Register for up and coming webcasts at http://msdn.microsoft.com/webcasts All times are Pacific Standard Time

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Attend MSDN Events Who Your Local Microsoft Developer Community Champion What Object Oriented Programming Fundamentals in VB.NET Programming with MapPoint Web Services Optimizing ASP.NET 1.1 Web Applications ASP.NET 2.0 Membership and Personalization Why Gain profitable designer information, coordinate with companions, and get VS 2005 Beta 1 Refresh and VS 2005 Express Betas on our substance rich unique occasion DVD When October through December, on Tuesdays and Thursdays from 1-5PM neighborhood time Where Cities over the United States How Visit MSDN Events at http://www.msdnevents.com to discover more!

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MSDN Webcast Resources Visit our blog http://blogs.msdn.com/msdnwebcasts for a rss channel of up and coming MSDN Webcasts Submit content inquiries amid the live webcast utilizing the "Pose a Question" catch For recordings of past MSDN Webcasts: www.microsoft.com/usa/webcasts/ondemand Got webcast content thoughts? Send utilize email at: webcasts@microsoft.com More webcasts at http://msdn.microsoft.com/webcasts Don\'t neglect to round out the study.

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