https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=210408
smi...@nimnet.asn.au changed:
What |Removed |Added
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CC| |smi...@nimnet.asn.au
--- Comment #1 from smi...@nimnet.asn.au ---
>From ipfw(8), second last paragraph:
" Due to the architecture of libalias(3), ipfw nat is not compatible with
the TCP segmentation offloading (TSO). Thus, to reliably nat your net-
work traffic, please disable TSO on your NICs using ifconfig(8)."
I don't know about RXCSUM & TXCSUM in this context, but NAT is only for
IPv4 - make sure your NAT rules only apply to ipv4 packets specifically -
and you certainly need to turn TSO4 off when using either kernel NAT
or natd(8), both of which use libalias(3).
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