I work on a linux 2.2.14 kernel to test the network throughput of a linux box used as a firewall. I find that when the IP packet length is 512B,the throughput is the highest 71%. IP packet length is smaller than 512B or bigger than 512B,the throughput is the lower. I don't know why this ? Can I have some solutions to improve the throughput of linux box ? Bergs __________________________________________________ Do You Yahoo!? Yahoo! Movies - coverage of the 74th Academy Awards® http://movies.yahoo.com/