Microsoft Core Infrastructure Segmentation

Klimko Vasiliy 21 Reputation points
2024-03-21T05:14:11.42+00:00

Hi. Like many companies we are forced to run an on-premise Exchange server since we are in a hybrid Exchange configuration. There is no practical way to get rid of our on-prem Exchange server at this time but I want to mitigate the security risks of having an on-prem Exchange server.

Do I need to segment basic infrastructure such as ADDS, ADCS, Exchange, AzureAD Connect into separate VLANs? If I have Exchange Hybrid, I need to put it on a separate VLAN because it has traffic in and out of Microsoft 365 ? There are best practices for partitioning into VLANs Microsoft basic infrastructure ?

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  1. Jing Zhou 1,475 Reputation points Microsoft Vendor
    2024-03-22T06:25:23.96+00:00

    Hello,

     

    Thank you for posting in Q&A forum.

    As a support engineer instead of a architecture, I would recommend you follow the principle of least privilege.

    For safety purpose, you can separate exchange hybrid into a single vlan, and only allow necessary traffic between other vlans. In this scenario, it will have least access to any other sensitive resources.

    Hope this answer can help you well.

     

    Best regards,

    Jill Zhou

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