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I have a new SharePoint site with anonymous access enabled and plan for it to be published over the internet.

I have heard the anonymous is very risky and exposes you to attacks, is that correct?

Could you please tell me how can I protect the SharePoint site from attacks?

Any thoughts?

4

By default, SharePoint is secure! Generally, your farm should be up to date with security fixes that bundled with the MU or the CU.

Sharegate wrote a good article about How to make SharePoint Secure. that summarized as the following:

  • Run the Microsoft Security Assessment Tool & Best Practice Security Analyzer Tool from Microsoft
  • Only enable the required Windows Services where you need them.
  • Only enable the required SharePoint Services where you want them to run.
  • Create multiple Service Accounts, that do not have Domain or Server Administration Permission
  • Use DNS URLs, not Server name for access
  • Only use known ports for access, such as 80 or 443, then control access via Firewalls
  • Do not disable the Windows Server Firewall
  • Utilize the “ViewFormPagesLockdown” feature
  • Protect external entry points via firewall rules
  • Allow Permissions only at the levels where needed, Farm, Service, Web, Site Collection, Site, and Content,.

Also check the below good references

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