Policy Framework Configuration Guide - Juniper Networks

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Junos 10.4 Policy Framework Configuration Guide Firewall Filter Types Supported Standards In addition to standard firewall filters, the Junos OS firewall filter implementation also supports two other firewall filter types: service filters and simple filters. Service Filters Service filters enable you to define filters associated with a defined set of services. Service filters are supported on services interfaces, which provide specific capabilities for manipulating traffic before it is delivered to its destination. You use service filters to refine the target of the set of services and also to process traffic. Only IPv4 and IPv6 traffic are supported on service filters. No other protocol families are supported. Simple Filters Simple filters are supported on Gigabit Ethernet intelligent queuing (IQ2) and Enhanced Queuing Dense Port Concentrator (EQ DPC) interfaces only. Unlike standard filters, simple filters support IPv4 traffic only and have a number of restrictions. For example, you cannot configure a terminating action for a simple filter. Simple filters always accept packets. Also, simple filters can be applied only as input filters. They are not supported on outbound traffic. Simple filters are recommended for metropolitan Ethernet applications. The Junos OS supports the following RFCs related to filtering: • RFC 792, Internet Control Message Protocol • RFC 2460, Internet Protocol, Version 6 (IPv6) • RFC 2474, Definition of the Differentiated Services (DS) Field • RFC 2475, An Architecture for Differentiated Services • RFC 2597, Assured Forwarding PHB Group • RFC 3246, An Expedited Forwarding PHB (Per-Hop Behavior) • RFC 4291, IP Version 6 Addressing Architecture • RFC 4443, Internet Control Message Protocol (ICMPv6) for the Internet Protocol Version 6 (IPv6) Specification 190 Copyright © 2010, Juniper Networks, Inc.
CHAPTER 9 Firewall Filter Configuration This chapter describes the following tasks for configuring firewall filters: • Configuring Firewall Filters on page 192 • Configuring Standard Firewall Filters on page 193 • How Firewall Filters Are Evaluated on page 196 • Overview of Match Conditions in Firewall Filter Terms on page 197 • Configuring IPv4 Match Conditions on page 197 • Configuring IPv6 Match Conditions on page 202 • Configuring Protocol-Independent Match Conditions on page 206 • Configuring Layer 2 Circuit Cross-Connect Match Conditions on page 206 • Configuring MPLS Match Conditions on page 208 • Configuring VPLS Match Conditions on page 209 • Configuring Layer 2 Bridging Match Conditions for MX Series Ethernet Services Routers on page 214 • Overview of Protocol Match Conditions on page 217 • Example: Matching on Destination Port and Protocol Fields on page 218 • Overview of Class-Based Match Conditions on page 219 • How to Specify Firewall Filter Match Conditions on page 220 • Configuring Actions in Firewall Filter Terms on page 226 • Configuring Nested Firewall Filters on page 233 • Applying Firewall Filters to Interfaces on page 235 • Overview of Firewall Filter Lists on page 239 • Firewall Filter Examples on page 244 • Example: Blocking Telnet and SSH Access on page 244 • Example: Blocking TFTP Access on page 245 • Example: Accepting DHCP Packets with Specific Addresses on page 245 • Example: Defining a Policer for a Destination Class on page 246 • Example: Counting IP Option Packets on page 246 • Example: Counting and Discarding IP Options Packets on page 247 Copyright © 2010, Juniper Networks, Inc. 191
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Junos ® OS Policy Framework Config
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END USER LICENSE AGREEMENT READ THI
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12. Commercial Computer Software. T
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Abbreviated Table of Contents Part
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Table of Contents About This Guide
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Table of Contents Testing Routing P
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Table of Contents Configuring Flow
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About This Guide This preface provi
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About This Guide • MX Series •
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PART 1 Policy Framework • Introdu
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CHAPTER 10 Introduction to Traffic
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CHAPTER 11 Policer Configuration Si
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PART 5 Indexes • Index on page 46
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Index of Statements and Commands A
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