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Re: [tcpm] Exceeding value in MSS option?

Joseph Touch <touch@strayalpha.com> Fri, 23 October 2020 15:11 UTC

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From: Joseph Touch <touch@strayalpha.com>
In-Reply-To: <f3ca83de-6962-56c4-e1d2-839bf074dbca@tele.no>
Date: Fri, 23 Oct 2020 08:11:28 -0700
Cc: Mirja Kuehlewind <mirja.kuehlewind@ericsson.com>, "tcpm@ietf.org Extensions" <tcpm@ietf.org>
Message-Id: <246C6457-BF65-4B66-970A-FD6C95A98772@strayalpha.com>
References: <BB0640E4-C7A9-4E1C-9F29-BD373A220BAB@ericsson.com> <247D753D-DA2C-47EF-9C38-C2B5E274FD8F@erg.abdn.ac.uk> <f3ca83de-6962-56c4-e1d2-839bf074dbca@tele.no>
To: Frode Kileng <frodek@tele.no>
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Subject: Re: [tcpm] Exceeding value in MSS option?
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> On Oct 23, 2020, at 1:37 AM, Frode Kileng <frodek@tele.no> wrote:
> 
> Although maybe not  a "general problem",  a study of MSS middlebox manipluation in  23 European and Asian mobile networks did reveal some issues:
> 
> - 20 of 23 networks always inserts MSS.

That IS a general problem, FWIW. 

Besides being published, it should also be reported to the operators of those networks as violating TCP specs.

Joe

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