Great to see you were able to successfully solve your installation issue! Thank you for confirming the problem with the excluded section - I created a suggestion for our documentation team you can watch, upvote, or comment on with additional information: DOCS-14314.
I know you prefer to manage your own hosting, but for future reference you might be interested to know that cloud security has evolved significantly.
With MongoDB Atlas:
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All storage volumes use cloud provider encrypted storage (encryption at rest).
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You can further Restrict MongoDB Support Access to Atlas Backend Infrastructure .
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You can also Manage Your Own Encryption Keys for a dedicated cluster so the data is completely opaque to Atlas support.
There’s more information on security, compliance, and privacy in the MongoDB Trust Centre.
With MongoDB 4.2+ (self-hosted or Atlas) you can also use Client-Side Field Level Encryption (CSFLE) to encrypt sensitive fields in documents prior to sending to the server. The CSFLE Guide includes some practical examples for using CSFLE and other security measures.
Regards,
Stennie