Re: The TCP and UDP checksum algorithm may soon need updating

Michael Richardson <mcr+ietf@sandelman.ca> Mon, 08 June 2020 00:59 UTC

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From: Michael Richardson <mcr+ietf@sandelman.ca>
To: Craig Partridge <craig@tereschau.net>, IETF discussion list <ietf@ietf.org>
Subject: Re: The TCP and UDP checksum algorithm may soon need updating
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Date: Sun, 07 Jun 2020 20:59:32 -0400
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Thank you for these references. 1 in 121. wow.

Craig Partridge <craig@tereschau.net> wrote:
    > Anecdotally, folks are reporting some middlebox vendors are not
    > updating the TCP checksum but rather letting the outbound interface
    > simply recompute the entire checksum -- which means that if the TCP
    > segment gets damaged during middlebox handling, the middlebox will slap
    > a valid checksum on bad data.

Seems like an argument for anyone dealing with large data transfers to
consider IPv4 End of Life.  IPv6 is here... Use it.

(I'd wish that this also meant using IPsec AH, which we could probably
do with IPv6, but we never got useful APIs.  Insert Sad-Poo Emoji)


--
Michael Richardson <mcr+IETF@sandelman.ca>ca>, Sandelman Software Works
 -= IPv6 IoT consulting =-