[Bug 209680] ipfw: when enabled, net connections time out/ssh results in "broken pipe"

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=209680

Fabian Keil <fk at fabiankeil.de> changed:

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                 CC|                            |fk at fabiankeil.de

--- Comment #2 from Fabian Keil <fk at fabiankeil.de> ---
Created attachment 170568
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=170568&action=edit
(Hopefully) make TCP/IP connections reliable under memory  pressure again

I don't use ipfw, but have occasionally seen similar issues recently
and am currently testing the attached patch in an attempt to prevent them.

While I haven't seen the problem since applying the patch,
I'm not absolutely sure yet that the patch is responsible for
this.

Given that you seem to be able to reliably reproduce the issue
I'd be interested to know if the patch makes a difference for your
workloads.

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