Please excuse some basic questions from a newbie, but:
Many people (including Cheswick and Bellovin) describe three different categories of firewalls: packet-filtering gateways, application-level gateways, and circuit-level gateways.
Would a typical Cisco with access control lists and TACACS+ be considered a packet-filtering gateway?
Which category does Firewall-1 fit into? The trade press continually paints them as a packet-filter but CheckpointÕs marketing folks have taken pains to distance themselves from this label.
How about LivingstonÕs Firewall IRX? Network Systems NetSentry?
Finally, what are some examples of a circuit-level gateway? IBMÕs NetSP? Others?
Thnaks in advance.