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From: Paolo Pisati <piso@FreeBSD.org>
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Subject: PERFORCE change 111248 for review
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http://perforce.freebsd.org/chv.cgi?CH=111248

Change 111248 by piso@piso_newluxor on 2006/12/07 15:51:05

	Document the incompatibility of ipfw/libalias with TSO.

Affected files ...

.. //depot/projects/soc2005/libalias/sbin/ipfw/ipfw.8#10 edit

Differences ...

==== //depot/projects/soc2005/libalias/sbin/ipfw/ipfw.8#10 (text+ko) ====

@@ -2624,3 +2624,10 @@
 Rule syntax is subject to the command line environment and some patterns
 may need to be escaped with the backslash character
 or quoted appropriately.
+.Pp
+Due to the architecture of 
+.Xr libalias 3 , 
+ipfw nat is not compatible with the tcp segmentation offloading
+(TSO). Thus, to reliably nat your network traffic, please disable TSO
+on your NICs using
+.Xr ifconfig 8 .