Re: [v6ops] [OPSEC] [EXTERNAL] Re: [IPv6] Why folks are blocking IPv6 extension headers? (Episode 1000 and counting) (Linux DoS)

[Vasilenko Eduard <[e-mail]>]

IMHO: Fernando comes here with a good example (EH DoS). Security is a good reason to block EHs.
But for business, every feature should be tested, supported, and somebody should pay an additional performance penalty.
I am not sure which reason is bigger: additional cost or security risk. It depends on the organization type.
Ed/
-----Original Message-----
From: OPSEC [mailto:[e-mail]] On Behalf Of Arnaud Taddei
Sent: Thursday, May 25, 2023 8:12 AM
To: Fernando Gont <[e-mail]>
Cc: Manfredi (US), Albert E <[e-mail]>; IPv6 Operations <[e-mail]>; 6man <[e-mail]>; [e-mail]
Subject: Re: [OPSEC] [EXTERNAL] Re: [IPv6] [v6ops] Why folks are blocking IPv6 extension headers? (Episode 1000 and counting) (Linux DoS)

Would like to support Fernando again, and not just because I have a Sony TV too. 

Cybersecurity is in such a bad state that I can only plea for a sense of realism and pragmatism vs dogmatism to get real solutions at hand to the defenders practitioners

If not I will ask people here to consider spending a week in a Security Operation Center when there is a Ransomware breaking up 

Fernando’s paper intentions will be appreciated by the defenders  



> On 25 May 2023, at 03:07, Fernando Gont <[e-mail]> wrote:
> 
> 
> 
> On 25/5/23 02:01, Manfredi (US), Albert E wrote:
>> -----Original Message-----
>> From: ipv6 <[e-mail]> On Behalf Of Fernando Gont
>>> Given the amount of things that get connected to the Net (smart bulbs, refrigerators, etc.) -- and that will super-likely never receive security updates, you may have to **rely on your own network**.
>>> 
>>> For instance, I wouldn't have my smart TV "defend itself".
>> Agreed, "on your own network." From the viewpoint of a household, whatever network defense has to be behind that household's router, for it to be credible, and preferably right in each host. Yeah, some IoT devices may not be updated regularly.
> 
> So, that's why people block them at the edge.
> 
> (just the messenger)
> 
> 
> 
>> The ISP has to worry about protecting that ISP's own network. 
> 
> That's e.g. where RFC9098 comes in, with notes on why they are dropped in places other than the edge network.
> 
> 
> 
>> Households have to be responsible for protecting their household's 
>> network. (And connected TVs do get regular software updates, as a 
>> matter of fact.)
> 
> I guess it all depends on the TV? e.g., I for one I'm not planning to throw it out just because Sony decided to quit pushing updates (which were never automatic for my set).
> 
> Thanks,
> --
> Fernando Gont
> SI6 Networks
> e-mail: [e-mail]
> PGP Fingerprint: F242 FF0E A804 AF81 EB10 2F07 7CA1 321D 663B B494
> 
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> rWtn


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