[Bug 839] SNAT66 does not work for bidirectional UDP

bugzilla-daemon at netfilter.org bugzilla-daemon at netfilter.org
Thu Aug 8 17:07:50 CEST 2013


Phil Oester <netfilter at linuxace.com> changed:

           What    |Removed                     |Added
             Status|NEW                         |RESOLVED
         Resolution|                            |INVALID

--- Comment #3 from Phil Oester <netfilter at linuxace.com> 2013-08-08 17:07:49 CEST ---
Most nics support checksum offload, so the incorrect checksums you are seeing
are false positives.  Disable checksum offloading via:

  ethtool --offload  ethX  rx off  tx off

then you should see valid checksums in tcpdump.  See
http://wiki.wireshark.org/CaptureSetup/Offloading#Checksum_Offload for further


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