neighbor discovery problem

[Jeremy Chadwick]

On Tue, Aug 12, 2008 at 01:17:27PM +0200, Mathieu Arnold wrote:
> +-le 12.08.2008 01:34:03 -0700, Jeremy Chadwick a dit :
> | Important note: I know absolutely nothing about IPv6.
> | 
> | Do you have ACLs on any of these machines?  !A in traceroute commonly
> | means there's an ACL blocking said packets:
> | 
> | !A  (communication with destination network administratively prohibited)
> | 
> | A ping from the other host might cause a stateful firewall to begin
> | allowing said traffic to/from the machine which previously wasn't
> | working.
> | 
> | If you use a firewall on these machines (ipfw, pf, etc.), I'd recommend
> | posting your problem to the freebsd-pf list instead.
> 
> Hum, no, I've verified it already, there is pf enabled on the gateway, which
> is also a firewall, but only on the external interface which does not come in
> play here.

That depends.  Are you using "set skip" on non-external interfaces, or
are you using pass rules to explicitly pass all traffic?

Sorry if it sounds like I'm doubting you, but !A really looks like an
ACL thing.

-- 
| Jeremy Chadwick                                jdc at parodius.com |
| Parodius Networking                       http://www.parodius.com/ |
| UNIX Systems Administrator                  Mountain View, CA, USA |
| Making life hard for others since 1977.              PGP: 4BD6C0CB |