Hi guys, I changed the ip addr of the skbuff before it was being sent to the network device driver. However, I got checksum error when the other side received it. I did convert the addr back to the original addr before doing checksum. Why did I get the checksum error? Is there anything that I miss out? Thanks for any advices. jon -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/