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voynov's avatar
voynov
Copper Contributor
Jul 04, 2023

MS Defender and Proxy Server

Hi all, I would be grateful for technical advice on setting up (and whether this is possible) MS Defender and Proxy Server.

A little more detail: We have developed a solution that is a Proxy Server that adds steganographic labels to documents that pass through it. This is necessary to protect documents from being photographed. More precisely, these labels can be used to determine the recipient of a compromised document. We are faced with the task of placing our proxy in front of cloud-based MS SharePoint. We have read that after authentication with Azure AD, Microsoft Defender can redirect traffic via Proxy Servers.

We need advice on how our proxy server can become an unconditional server, without the possibility of bypassing it and directly accessing SharePoint. If there are engineers who have knowledge in this area, please respond. I will be very grateful.

Thank you.

 

2 Replies

  • BellaNahut's avatar
    BellaNahut
    Copper Contributor

    Your solution sounds pretty cool, by the way! So, to make sure that your proxy server is the go-to server and there's no way to bypass it and directly access SharePoint, you can configure Microsoft Defender to redirect all traffic through the http://pyproxy.com/?utm-source=crd&utm-keyword=?0920 . This way, any requests to SharePoint will have to go through your proxy server first.

  • voynov in this case the proxy server is actually part of Defender for Cloud Apps, so the intention is not to direct to an external proxy server in this scenario.

     

     

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