On Thu, Sep 20, 2007 at 05:56:50PM +0200, Rob Janssen wrote:

||  Vincent Zweije schreef:
||  > I'm not sure I'd want my ISP blocking packets with globally unroutable
||  > source addresses.  As long as they're targeted at me, I'll have them.
||  >
||  > In fact, I don't really want my ISP to do any filtering.  I want them
||  > to shove around packets for me.
||  >
||  >
||  Well, when your provider is XS4ALL (which your signature suggests), they
||  *are* filtering those packets both incoming and outgoing.
||  I think it is responsible action by ISPs to do ingress filtering,
||  because the advantages outweigh the disadvantages in most cases.

I agree that is probably the responsible action. Nevertheless, personally
I think I would like to decide for myself.

But we digress. :-D

||  > Anyone sending out such packets will probably have a very hard time
||  > getting a reply.  If there is a problem, it will sort out itself soon
||  > enough.
||  >
||  I think you are over-estimating the fault finding abilities of the
||  average Internet user.  I have seen often enough that bad error
||  conditions persist for a long time, even after the admin has been
||  notified.  Many admins won't put fault finding at a high priority as
||  long as the network is not completely down.

I am guessing that if someone misconfigures a device to use unroutable
addresses, more than just NTP will be broken, and it will probably be
noticed and acted on.

Ciao.                                                         Vincent.
-- 
Vincent Zweije <[EMAIL PROTECTED]>    | "If you're flamed in a group you
<http://www.xs4all.nl/~zweije/>      | don't read, does anybody get burnt?"
[Xhost should be taken out and shot] |            -- Paul Tomblin on a.s.r.

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