http://blogs.technet.com/isablog/archive/2006/04/27/426532.aspxISA Server does not handle IPv6 traffic. IPv6 traffic will pass through the ISA Server firewall regardless of your firewall policy. We recommend that you not enable IPv6 traffic on the ISA Server computer or array. If you have enabled IPv6 traffic, ween-USCommunityServer 2.1 SP1 (Build: 61025.2)http://blogs.technet.com/isablog/archive/2006/04/27/426532.aspx#426618Fri, 28 Apr 2006 01:13:58 GMTd5e57398-b9ef-4490-9955-07cbb4e4a80d:426618AmyNathan, <br> <br>The question on mailing lists is usually if a PC on the network has v.6 installed and ISA does not, does ISA pass the traffic through or prevent it?http://blogs.technet.com/isablog/archive/2006/04/27/426532.aspx#426805Sat, 29 Apr 2006 21:11:06 GMTd5e57398-b9ef-4490-9955-07cbb4e4a80d:426805petizmeHi, <br> <br>But ISA RTM will work if ipv6? <br> <br>byehttp://blogs.technet.com/isablog/archive/2006/04/27/426532.aspx#426822Sun, 30 Apr 2006 10:38:16 GMTd5e57398-b9ef-4490-9955-07cbb4e4a80d:426822isablogIf a PC on the network has v.6 installed, and ISA has it disabled, the traffic will not pass through ISA. <br> <br>ISA Server 2006 will not handle IPv6 in the RTM version, so the advice provided applies to that version, as well as previous versions of ISA Server. <br> <br>Nathan Bigman <br>ISA Server User Educationhttp://blogs.technet.com/isablog/archive/2006/04/27/426532.aspx#3189324Thu, 22 Jan 2009 06:29:25 GMTd5e57398-b9ef-4490-9955-07cbb4e4a80d:3189324IP v6 for ISA Server 2004 and Upcoming 2006 | keyongtech<p>PingBack from <a rel="nofollow" target="_new" href="http://www.keyongtech.com/1228055-ip-v6-for-isa-server">http://www.keyongtech.com/1228055-ip-v6-for-isa-server</a></p>