Azure Stack Development Kit – moving around (changing IP’s)

When you have your Azure Stack Development Kit, you might want to show it off to your customers or simply change the external IP address for some other reasons.. as we have seen earlier there is a dual NAT mode inside the Azure Stack Dev Kit box. The AzS-BGPNAT01 VM receives an external IP address […]

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Azure Stack Development Kit – Unable to place Virtual Machines

If you are playing around with Azure Stack Development Kit, you might come across the following error: While the error states: Unable to place Virtual Machines for specific class and size due to low memory capacity my immediate thought was to check the memory utilization on the host: With over 73Gb of memory left, I […]

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Azure Stack Development Kit – BGP

Now that we have our Azure Stack Development Kit in routing mode, we can also send the BGP information from within the Stack to the Juniper Firewalls (or any FW you have..). This will ensure that the new “external IP addresses” that are assigned to our workloads are accessible via our intranet route information and […]

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Azure Stack Development Kit – Routing Mode (removing NAT)

When you install Azure Stack Development Kit it is a completely isolated service with multiple networks. It means that your Azure Services (such as ADFS, the portal and AD) are not available outside of the box at all. But what if you wanted to use the Azure Stack DK from multiple computers?  or in our […]

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Azure Stack Development Kit – Deployment overview (troubles)

Side Note: The experience of ASDK as described in this post are based on the late July bits of Azure Stack on a Dell T710. Future experience might (I certainly hope so..) be better and more integrated..  The T710 described in an earlier topic was purchased to run Azure Stack. And while I’m still waiting […]

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Azure AD – PtA – SSO – Office 365 ProPlus Auto Activation

You invested in Office 365 for you users, but you don’t want to annoy them with prompts where they have to put their usernames and passwords in, certainly as you have domain joined devices. For Office 365 ProPlus License Activation utilizing the SSO capabilities, you either had to put in an ADFS infrastructure or.. available […]

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Azure AD – Pass-through Authentication SSO – reset password

We’ve already covered Azure AD PtA with SSO. Where a local computer object is created in your on-premises AD to help with the authentication. While the password of the object is changed periodically.  Many organizations have the requirement to reset the computer password on the fly or at a faster interval. Microsoft has released a […]

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The hardware

Sometimes I get the question; what do you work with.? as in .. which computers.. and to provide an answer: This “oh look at my hardware” post.. or more like “the hardware pissing contest equivalent” on many of the blogs.. In short, I don’t like to buy brand new stuff.. its expensive, it looses value like […]

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Multi-domain ADFS with alternateID login

So, I got a question the other day on using ADFS in combination with some 3rd party applications in a very large AD environment. Basically the problem statement was: “ we don’t want to use UPN and we don’t want to use domain\username. Users should be able to login using either (only) their employeeID or […]

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Azure AD Lockout configurations – avoiding AD account locks

On Monday morning, the office opened, and everyone tried to login to their computers, however no-one seemed to be able to login. The helpdesk was quickly flooded with calls and it seems everyone’s account was locked-out.

It could happen to almost every company that does not have a good policy on lockouts. Hackers try as many usernames and passwords as possible to get in or to deliberately lock everyone out. A Denial of Service attack in a different form.

When you are using Azure Active Directory with a password on-premises, this might become a reality. As many attempts are made on the ADFS server in a Federated architecture, the account in AD itself gets locked out.

But there is a way to avoid that. It is possible to have a pre-emptive lockout on ADFS while the internal AD account is still usable. This means users will not be able to login remotely to ADFS anymore for a period, but they will still be able to logon to their domain joined machines. When configuring this, make sure that the lockout is set to a lower standard than your internal AD policies. For example, if your AD policy states 5 attempts, 10 minute lockout, ensure that the ADFS policy is set to a maximum of 4 attempts.


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