Network security: Minimum session security for NTLM SSP based (including secure RPC) clients This security setting allows ...

Network security: Minimum session security for NTLM SSP based (including secure RPC) clients

This security setting allows a client to require the negotiation of 128-bit encryption and/or NTLMv2 session security. These values are dependent on the LAN Manager Authentication Level security setting value. The options are:

Require NTLMv2 session security: The connection will fail if NTLMv2 protocol is not negotiated.
Require 128-bit encryption: The connection will fail if strong encryption (128-bit) is not negotiated.

Default:

Windows XP, Windows Vista, Windows 2000 Server, Windows Server 2003, and Windows Server 2008: No requirements.

Windows 7 and Windows Server 2008 R2: Require 128-bit encryption

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