netdev - Re: ICMP rate limiting in IPv4 but not in IPv6

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Message-ID: <CAOp4FwQ6YWpMtZ9-64tVDc29RhtiUjwinQjZ32mjEu_pZfRHHA@mail.gmail.com>
Date:	Fri, 13 Sep 2013 21:26:11 +0400
From:	Loganaden Velvindron <loganaden@...il.com>
To:	Andy Johnson <johnsonzjo@...il.com>,
	netdev <netdev@...r.kernel.org>
Subject: Re: ICMP rate limiting in IPv4 but not in IPv6

On Fri, Sep 13, 2013 at 8:44 PM, Hannes Frederic Sowa
<hannes@...essinduktion.org> wrote:
> On Fri, Sep 13, 2013 at 06:57:56PM +0300, Andy Johnson wrote:
>> Hello,
>> After probing into the RFC of ICMPv6, I am even more confused.
>>
>> RFC 4443 says:
>>
>> 2.4.  Message Processing Rules
>> ...
>>
>> (f) Finally, in order to limit the bandwidth and forwarding costs
>>        incurred by originating ICMPv6 error messages, an IPv6 node MUST
>>        limit the rate of ICMPv6 error messages it originates.
>> ...
>> The rate-limiting parameters SHOULD be configurable.
>> ...
>>
>> Any ideas?
>
> Well, nobody has implemented it because nobody missed the feature yet. I
> don't believe there is another reason for that. If you come up with a
> patch, I am sure it can go upstream.
>
> Do you want to try to come up with a patch? We need to be a bit
> careful regarding neighbor discovery but otherwise this should be
> relativ straightforward. In the meantime you could also implement such
> ratelimiting with netfilter.

Careful ? Can you please elaborate ?


>
> Greetings,
>
>   Hannes
>
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