Date: Wed, 22 Jun 2016 08:05:21 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-ipfw@FreeBSD.org Subject: [Bug 210408] Problem with outgoing traffic using ipfw and kernel nat originated from local address Message-ID: <bug-210408-7515-F93qu9J3yc@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-210408-7515@https.bugs.freebsd.org/bugzilla/> References: <bug-210408-7515@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D210408 smithi@nimnet.asn.au changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |smithi@nimnet.asn.au --- Comment #1 from smithi@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). --=20 You are receiving this mail because: You are the assignee for the bug.=
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