Active Directory (AD) is a directory service created by Microsoft for Windows domain networks it provides an central location for network administration and security

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How do I sanitize LDAP input and prevent injection attacks? What LDAP injection scenarios are possible?

In the following C# example I'm querying AD's configuration container for Exchange overrides. If the domain name in unsanitised the end user could get LDAP to read a different object then intended. ...
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How do I constrain Windows Smartcards for AD Authentication so that “anyExtendedKeyUsage” is not implied?

This document describes how there are 3 ways to constrain a SmartCard certificate The Enhanced Key Usage field defines one or more purposes for which the public key may be used. RFC 5280 states ...
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Two-factor authentication w/certificate and username & password?

Example scenario: ActiveSync Authentication method: certificate-based authentication AND Active Directory domain username-password Encrypted on device: public & private key AD username ...
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What's the risk if I accidently type my password into a username field (Windows logon)?

I'm used to logging into my personal Mac which is a password-only field (like waking from sleep mode). Sometimes I have to use a Windows network on which I have an account, but of course I have to ...
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Preferred UAC configuration in Enterprises that use Login scripts to map drives

In Windows 7, Vista and newer OS's, UAC will prevent logon scripts from mapping hard drives so that the following logon script code won't work: Dim WshNetwork Set WshNetwork = ...
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What are the risks of removing ISATAP from the default global block list?

The process of installing Microsofts pseudo VPN called Direct Access requires me to remove the ISATAP name from the default global block list by running this command: dnscmd /config ...
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Multiple security layers for SOA REST intranet services

For intranet applications that already leverage Active Directory, is there any point or benefit to adding a second layer of security such as OAuth when accessing SOA REST services? We're new to SOA ...
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How to use OAuth with Active Directory

I'm creating a REST WCF service and want to use OAuth to authenticate each user's request. The user accounts are stored in Active Directory so I have access to their AD login name on the client ...
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If password is changed on Active Directory, can I ensure that PC must be restarted before logon with new password

Basically, if I have a Windows computer connected to a domain, how can I ensure that if the password is changed on Active Directory that the computer must be restarted before the new password takes ...
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Active Directory: Should Workstations be separated from servers to protect from related domain hacks?

How should I protect domain joined hosts in the same AD domain from the Related Domain Cookie Attack? Suppose there is an AD forest called example.com. This company has a variety of internal and ...
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How does multi factor authentication modify the AD authentication process?

I'm trying to understand what would have to be updated to make Windows-based systems support multifactor authentication. Possible things that might have to be modified: Active Directory / Domain ...
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What is the best way to manage temporary accounts on Active Directory [closed]

The organisation i work for has a high turnover of staff and we have a 5 day SLA to set up a new user. However this seems to be inefficient for ourselves and the business we serve. Is there anyway ...
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Client access to domain controller

I'm working on a solution to identify if a machine is a member of the domain or not. We are using Checkpoint R75 Identity Awareness with two possible methods to retrieve machine identity. AD Query ...
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What information is exposed in AD's Service Connection Points (SCP)

Active Directory offers a feature called Service Connection Points to publish information to applications so they can discover the relevant server; however the documentation is sparse and I have ...
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Strange Event Log Entry - Windows Server 2008

Reviewing some logs recently, and came across a strange failure in our Windows 2008 DC. An account failed to log on. Subject: Security ID: NULL SID Account Name: ...
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How do I deploy AD in a hostile location? What are the security implications between Domains, Forests vs RODC's in Active Directory?

Short version What are the risks/ benefits / drawbacks of RODC's vs Child Domains vs Forest Trusts in AD Background I'm working with a company that has various business agreements between many ...
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What practical uses are there for the AD feature of “Confidential Attributes”

Are any applications (off the shelf, or internal) leveraging Active Directory's Confidential Attributes? Would you store sensitive information here such as a private key, or a salt here? I'm ...
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Should I only disable, but never delete an account from ActiveDirectory?

In the early days of NT4, I would never delete an account from the domain because I would lose the correlation between the SID and username in event logs and all related audit trails. Is this a ...
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LDAP Security problems?

I have installed many Active Directory (AD) based networks and have applied various standard security templates based on best practices, however I have never really looked at LDAP on a deeper level ...
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Using AD authentication in a publicly accessible webapp

I am sys admin working with a development team who is extending a publically accessible .net web app that currently uses forms authentication with usernames/passwords (hashed) stored in a sql ...
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Deploying a campus WiFi network that authenticates against an AD LDAP

We are looking to deploy about 15-20 Cisco 1131ag access points on campus. I have been reading up on different authentication methods, but I don’t know what will be the best long term solution that ...
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How do you discover what permissions an AD group has, if you have no documentation?

You just got hired at company A and the old administrator is no longer there. Requests start coming through for adding users to the internet restrict group. When you look at the groups none of the ...
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Password History/Password policy

I'm referring to "remembered" password that the domain keeps so a user cannot reuse that password until it has expired in what was set at Password Policy on DC (W2003/W2008). Where is password ...
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How can I detect users that have requested AD Administrators to reuse an expired password?

There is a trend among companies I've worked at where administrators (or helpdesk folks) give a user a courtesy extension of the old expired password... rather than forcing the user to change it. ...