topic SSL Decryption for Office 365 and Sharepoint in General Topics

SSL Decryption for Office 365 and Sharepoint

FarzanaMustafa — Wed, 02 Oct 2019 05:14:41 GMT

We want one user to access sharepoint and sharepoint only via the internet, everything is to be locked down.

We have gone through the KB below.

https://knowledgebase.paloaltonetworks.com/KCSArticleDetail?id=kA10g000000ClTDCA0

It says to enable SSL Decryption. Do we need any certificate, Decryption Profile setup for this? Or the following setup is good enough?

Re: SSL Decryption for Office 365 and Sharepoint

BPry — Wed, 02 Oct 2019 17:54:10 GMT

@FarzanaMustafa,

You'll need to actually configure decryption to get this to work, as your policy doesn't even include a decryption profile. More information can be found on how to do so HERE

Re: SSL Decryption for Office 365 and Sharepoint

OtakarKlier — Wed, 02 Oct 2019 18:41:11 GMT

Hello,

Also O365 and sharepoint dont like to be decrypted :(. I recommend you bypass these for decryption policies.

Regards,

Re: SSL Decryption for Office 365 and Sharepoint

FarzanaMustafa — Wed, 09 Oct 2019 04:36:49 GMT

Just want to let all know that following the documentation did not work.

Our client followed the steps below to allow one user to access sharepoint and sharepoint only via the internet while everything is locked down.

Objects > URL Category and created a new URL Category called SharePoint Online with all the URLs required for access to SharePoint Online.

Objects > URL Filtering and created a new URL Filter. All categories turned off except SharePoint Online and content-delivery-networks. Additionally;

URL Filtering Settings > Turn on > Log Container Page Only, User-Agent, Referer and X-Forwarded-For

User Credentials Detection > Use IP User Mapping and set Valid Username Detected Log Severity to HIGH

HTTP Header Insertion > Create new called Office365

Type > Microsoft Office365 Tenant Restrictions

Headers > add Tenant ID to Value field for Restrict-Access-To-Tenants and Restrict-Access-Context

Now we create the rule in Policies

Application > any

Service/URL Category > any

Actions > URL Filtering > the name of the filter you created above.

These steps ensured me that this only have access to SharePoint online via SSO and user could not access any other material online.