Broken Link - Firewall and Virtual Private Network Communication for Oracle

The link for Firewall and Virtual Private Network Communication for Oracle Enterprise Manager on http://otn.oracle.com/products/oem/files/best_practices.html returns a 404 error. It is not pointing to the correct document

This link is still broken !
Can you please correct this ASAP ?
Best regards, Yolanda
Oracle HUB support services

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