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Re: [Snac] Router using Ipv6 prefix length = 67

Ted Lemon <mellon@fugue.com> Wed, 07 June 2023 00:12 UTC

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From: Ted Lemon <mellon@fugue.com>
Date: Tue, 06 Jun 2023 20:12:27 -0400
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To: Michael Richardson <mcr+ietf@sandelman.ca>
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Subject: Re: [Snac] Router using Ipv6 prefix length = 67
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I think it makes sense to have the definition of “usable prefix” specify
that the length needs to be 64 bits. Otherwise this turns into a DoS
attack.

On Tue, 6 Jun 2023 at 20:03, Michael Richardson <mcr+ietf@sandelman.ca>
wrote:

>
> I couldn't understand all of this thread.
> Is this WNP3000 receiving a plen=67 prefix from upstream and doing the
> wrong thing?
>
> Or is this WNP3000 receiving a plen=64 prefix from upstream, and then
> splitting it up into 8 unuseable prefixes of len=67?
> Or ???
>
> I agree that the SNAC Stub router needs to defend against unuseable
> prefixes.
> (It seems like it should be a call home and report situation, since nobody
> local will know what to do.  But that's not subject to standardization)
>
> --
> Michael Richardson <mcr+IETF@sandelman.ca>   . o O ( IPv6 IøT consulting )
>            Sandelman Software Works Inc, Ottawa and Worldwide
>
>
>
>
> --
> Snac mailing list
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