When I Try to connect from Ubuntu with FreeRDP to Windows 2008 R2 with NLA:
[14:29:31:523] [1146:-1236755648] [ERROR][com.freerdp.core] - connect
[14:29:31:523] [1146:-1236755648] [ERROR][com.freerdp.core.nego] - Protocol Security Negotiation Failure
[14:29:31:523] [1146:-1236755648] [ERROR][com.freerdp.core] - freerdp_set_last_error 0x2000C
[14:29:31:523] [1146:-1236755648] [ERROR][com.freerdp.core.connection] - Error: protocol security negotiation or connection failure