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For ease of readability, the firewall filter policy is often referred to as firewall filter in this guide. |
To control the way routing information and data packets are handled, a Services Router uses the JUNOS policy framework. This framework consists of routing and firewall filter policies. Although these policies share fundamental similarities, they are different in their functionality and application. The routing policies control how information is imported to and exported from the routing tables, acting exclusively at the Routing Engine level. Firewall filters examine packets at the entry (ingress) and exit (egress) points of the Services Router, filtering traffic at the router level.
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For ease of readability, the firewall filter policy is often referred to as firewall filter in this guide. |
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You must have a license to configure a stateful firewall filter and Network Address Translation (NAT). For license details, see the J-series Services Router Administration Guide. |
To manage the flow of information into and out of a Services Router, you must understand the fundamentals of routing and firewall filter policies. This chapter provides a brief overview of the policy fundamentals, under the following topics. If you need more information, see the JUNOS Policy Framework Configuration Guide.