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Re[2]: Bypassing ISA Server 2004 with IPv6
From: Christine Kronberg <seeker () shalla de>
Date: Mon, 10 Apr 2006 21:34:16 +0200 (CEST)

On Mon, 10 Apr 2006, 3APA3A wrote:
--Wednesday, April 5, 2006, 2:12:10 PM, you wrote to bugtraq () securityfocus com:

CK>    is  open  for any attacks as long as they are IPv6 based. If that
CK>    is  right,  this is an extremly nasty bug. If ISA Server 2004 and
CK>    Windows  2003  Basic  Firewall cannot filter that stuff it should
CK>    simply drop it.

You are not right.

1. IPv6 is not installed by default.
2. If IPv6 is installed, routing is not enabled by default.
3. If  you  install  IPv6,  you  can be bind it to only interfaces it's
required. To prevent IPv6 (or another routable protocol, such as IPX) on
external  interface  you  can (and you should) unbind this protocol from
interface in network connection properties. ISA is not required for this
task and is not supposed for this task.

  Thanks for clearing that. But: If ISA is not able to filter IPv6 so
  why can it be bound to an interface anyway? Just to route things
  through? Blindly through a firewall?
  Another posting talks about limited filtering capabilities. Roman
  wrote, icmp went through. So where is the borderline? It still seems
  to me that in the moment for what ever reason ipv6 is enabled on ISA
  the network it should secure is exposed.


  Christine Kronberg.

Shalla Secure Services

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