3/20/2024 0 Comments Account lockout tools server 2012![]() ![]() In order to mitigate this, the external firewall in front of the AD FS server could be set to only allow HTTPS traffic to the AD FS endpoint from the IP address ranges that are part of Office 365. The below is an example for AD FS 2.0 running on Windows 2008 R2. If an entity knew the user account name, they could access the AD FS proxy page and enter a bad password for the user account. If AD has a password lockout policy set, then an external entity hammering the AD FS logon page could then lockout an AD account. In the previous versions of AD FS there was no native mechanism within AD FS itself to prevent brute force attacks upon AD FS. Update 3-9-2014: Please also review this post for an issue requiring a hotfix to resolve with Extranet Account Lockout Protection AD FS Account Lockout What I do want to cover in this post is AD FS and how it can impact account lockouts should you have an aggressive lockout policy enabled. In a future post I'll circle back on the underlying account lockout policy discussion, so let's park that one for right now.
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