Windows 2008. cannot connect via RDP anymore after changes to Firewall prot settings

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http://serverfault.com – After successfully changing default RDP port on remote Windows 2008 R2, I configured that inbound rule to apply only to authenticated connections (because i needed to assign ONLY specific users to be able to remotely connect). Once I selected the option (something like that) "allow this rule only to authenticated connections".. the remote server disconnected me and I can no longer reach server via RDP. How can I access again? Any advice for me please? (HowTos)