packet filter


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packet filter

A software routine that analyzes incoming data packets and forwards them or discards them based on one or more criteria such as address, range of addresses and type (email, file transfer, etc.). Packet filtering is generally performed in a router, in which case the router is known as a "screening router." See deep packet inspection, firewall, Web filtering and router.
References in periodicals archive ?
Finally, the packet filter in the network layer or the device driver performs filtering based on the updated filtering rules in the network layer (IP) parameters (5), which is monitored by the network layer (1).
It offers three types of firewalls: packet filters, circuit-level gateways, and application gateways.
With a price point of $995 and a standard feature set that includes a secure wireless access point, firewall, VPN, AV, Antispam, URL filter, Deep Packet filter, a small office server and the ability to add advanced features now or later like an IDS, Vulnerability Scanner, SEMS, or WiFi/LAN Authentication, it is hard to beat.