The packer filter: an efficient mechanism for user-level network code
SOSP '87 Proceedings of the eleventh ACM Symposium on Operating systems principles
The BSD packet filter: a new architecture for user-level packet capture
USENIX'93 Proceedings of the USENIX Winter 1993 Conference Proceedings on USENIX Winter 1993 Conference Proceedings
EtherPIPE: an ethernet character device for network scripting
Proceedings of the second ACM SIGCOMM workshop on Hot topics in software defined networking
Towards a GPU accelerated virtual machine for massively parallel packet classification and filtering
Proceedings of the South African Institute for Computer Scientists and Information Technologists Conference
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The BSD/OS IPFW packet filtering system is a well engineered, flexible kernel framework for filtering (accepting, rejecting, logging, or modifying) IP packets. IPFW uses the well understood, widely available Berkeley Packet Filter (BPF) system as the basis of its packet matching abilities, and extends BPF in several straightforward areas. Since the first implementation of IPFW, the system has been enhanced several times to support additional functions, such as rate filtering, network address translation (NAT), and traffic flow monitoring. This paper examines the motivation behind IPFW and the design of the system. Comparisons with some contemporary packet filtering systems are provided. Potential future enhancements for the IPFW system are discussed.