The Study of Packet Forwarding based on Netfilter
Zhou Ke · Microcomputer Information · 2008
As the rapid growth of network bandwidth,packet forwarding speed has become the bottleneck of packet capture system. Netfilter is put forward from Linux Kernel 2.4 and can be used to control packet. In this paper,some methods of packet forwarding are introduced to decrease copy,and Netfilter is used finally. The result of performance evaluation exposes that the speed of packet forwarding using Netfilter is faster than that using libpcap and it decreases the host CPU’s utilization. But at the same time,the in-efficiencies of Netfilter are highlighted. It will be done to decrease CPU’s utilization and improve the performance of kernel in later studies.