Microsoft Windows [Version 6.0.6001] (C) Copyright 2006 Microsoft Corp. c:\windows>netsh ras ipv6 set access ?
Usage: set access [mode = ] ALL|SERVERONLY
Parameters:
mode - what type of access to grant
ALL - clients are able to reach the remote access server
and any networks to which it is connected.
SERVERONLY - clients are able to reach the remote access server
only.
Remarks: Specifies whether IPv6 network traffic from any client is
forwarded to the network(s) to which the remote access server
is connected.