win文件共享+NAT=杯具
You cannot make more than one client connection over a NAT device
http://support.microsoft.com/default.aspx?kbid=301673
TCP/IP and NBT configuration parameters for Windows XP
http://support.microsoft.com/default.aspx?kbid=314053
TCP/IP and NetBT configuration parameters for Windows 2000 or Windows NT
http://support.microsoft.com/default.aspx?kbid=120642
TCP/IP and NBT configuration parameters for Windows XP