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Date:      Mon, 29 Jan 2018 16:57:51 +0000
Subject:   [Bug 225536] ipfw tcp-setmss doesn't seems to work
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Andrey V. Elsukov <> changed:

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--- Comment #3 from Andrey V. Elsukov <> ---
(In reply to Emmanuel Vadot from comment #2)
> I've just tested without NAT (just bypassing by adding the destination IP=
> a discarded table) and the situation is the same.
> So maybe fib are the problems ?

Can you clarify a bit, is tcp-setmss works for locally originated traffic, =
doesn't work for forwarded traffic not depending from presence of NAT?

Also, since you use NAT, you need to disable TSO on the used NICs.

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