(usagi-users 03847) Re: IPv6 with Ipsec and Racoon issue

Neighbor Discovery is used by ping6 to obtain the MAC of a remote host
before pings begin. Once it runs, host A has host B MAC in network cache
for other programs to use.

Your host A, the ND message it sends, is it a ND Solicitation message?
Does host B respond with the ND Advertisement and do you process it?

IPv6 depends on Neighbor Discovery for MAC addresses which is a security
issue.

Michael

[ Message from: Philip Bellino  ]
> Hello,
>
> I know this may not be the forum to ask this question, but I am haivng
> no luck on finding out if there is a solution to the problem stated
> below.  I am looking to see if anyone from this group has seen this
> issue:
>
>
> Running ipsec-tools-0.6.7 on a Linux client and host.
> I use Racoon with pre-shared keys and Security Policies with ESP/AHs
> configured for IPv4 and IPv6.
>
> There is no problem with IPv4.
>
> I see a chicken and the egg problem with IPv6.
>
> An ICMPv6 Neighbor Solicitation goes from Host A to Host B.  This is
> o.k. because it is not subject to IPsec.
> The ICMPv6 Neighbor Discovery from Host B is not o.k. because since
> there exists a SP that requires ESP/AH, it triggers an SA negotiation.
> So, it looks like a loop is created and the result is that it does not
> work.
>
> I have tried adding in:
> spdadd ::/0 ::/0 icmp6 -P out none;
> spdadd ::/0 ::/0 icmp6 -P in none;
>
> And although the icmps are now not subject to IPsec, I still get the
> "phase1 negotiation" failure  in Racoon.
>
> The only way (besides not using Racoon and manually adding keyed SA's)
> is the following:
> 1.  Stop the Racoon daemons flush/spdflush all the SAs and SPDs
> 2.  Issue a ping6.
> 3.  Re-issue the SPDs.
> 4.  Start Racoon.
>
> Does anyone know of a permanent solution to this issue?
>
> Thanks,
> Phil Bellino
>
>
> ============================
> Phil Bellino
> MRV Communications, Inc.
> Boston Product Division
> 295 Foster St.
> Littleton,MA 01460
> Tel: (978)952-4807
> Email: [email protected]
> ============================
>
>