Setting server accelerator options, Option Description | Intel 1520

Setting server accelerator options

The Server Accelerator section allows you to conﬁgure the appliance as a Server Accelerator (also known as a reverse or server-side proxy). You can enable or disable this function as well as control how the appliance routes document requests to the slower traditional Web servers. For more information about setting up the appliance as a Server Accelerator, see Setting general controls‚ on

page 62.

The following table describes Server Accelerator options.

Option Description

Server Acceleration

Enables or disables server acceleration.

If you select on, the appliance is a server accelerator for the Web servers specified in document route rewrite rules defined through the command-line interface.

Reverse proxy	Sets the appliance to operate solely as a server
only	accelerator. If you select Yes, the appliance does not serve
	requests to unspecified Web servers from the cache. See
	Understanding server acceleration mapping rules‚ on
	page 132 for information on creating document route
	rewriting rules.
	If you select No, the appliance serves requests from
	unspecified Web servers as a normal proxy cache.

Document Route	Allows you to view, modify, or add document route rewrite
Rewriting Rules	rules. See Understanding server acceleration mapping
	rules‚ on page 132 for information on document route
	rewrite rules.

URL to redirect	Specifies an alternate URL that incoming requests from
requests without	older clients that do not provide a Host: header can be
Host header	directed.
	It is recommended that you set this option to a page that
	explains the situation to the user and advises a browser
	upgrade or provides a link directly to the origin server,
	bypassing the appliance. Alternatively, you can specify a
	map rule that maps requests without Host: headers to a
	particular server.

▼Creating a document route rewriting rule

1In the Server Accelerator section, click the Document Route Rewriting Rules link.

The Conﬁgure: Routing: URL Rewriting page appears. This page displays the set of current rules as well as a Add Entry button that lets you create new rules.

Chapter 4 Conﬁguring the Appliance

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Intel 1520 manual Setting server accelerator options, Option Description

Contents

Intel NetStructure 1520 Cache Appliance Copyright 2000, Intel Corporation. All rights reserved Contents Configuring the Appliance Using the Command-Line Interface Troubleshooting Problems 109 Error Messages 151 Changing network address configuration on the NIC Contents 106 Preface Bold Who should read this manualConventions used in this manual Convention Purpose Introduction Chapter Web proxy cache What is an Intel NetStructure Cache Appliance?Why use this caching appliance? Flexible cache architecture Intel NetStructure Cache Appliance features Broad protocol support Secure, single-point administrationMultithreading process support High-speed caching To find out about … See … How to use this guideSnmp Network Management Performance reportingPage Getting Started Starting the system for the first time Controls and physical features on your system Command-line interface‚ on Hhmmss Getting Started Accessing the Manager UI Dashboard Using Monitor and Configure mode Monitor mode frame Configure mode frame Verifying that caching works Using online helpAccessing the command-line interface Changing passwordsPage Monitoring Appliance Performance Using the Dashboard Accessing monitor pages Alert light Condition Description Resolving alarmsDashboard alert lights Exposing node detail Changing the selected node Using the Node Using the ARM Using the GraphsUsing the Protocols Using the Cache Using the Mrtg Using the Other Configuring the Appliance Using the Server Basics Accessing configure pages NetStructure Cache section Setting general optionsOption Description What are virtual IP addresses? Setting Web management optionsSetting virtual IP addressing options Using virtual IP addressing for node failover Adding entries to the Virtual IP address list Setting throttling of network connections Setting browser auto configuration optionsConfiguring load-shedding Enabling Snmp agents Option Definition Configuring Http Configuring Nntp Name and port see Option Definition FTP Configuring FTP Cache activation Freshness Storage For IMS If Modified Since revalidation requests Following table describes the variable conﬁguration options Variable content Using the Routing Using the SecurityLink displays the Change Administrator’s Password Setting Http parent caching options Establishing ICP peers Setting ICP options Field Description Option Description Setting server accelerator options Checking transparency Using the Host DatabaseChecking Wccp Configuring the host database Another invalid hostname message to the user Using the Snapshots Configuring DNS Reaching the Snapshots Using the Command-Line Interface Using the appliance after initial start-up Starting the command-line interfaceStarting the appliance the first time To do this Do this Navigating the command-line interface Changing network addresses configuration Using the setup menu Changing the DNS address and domain name Changing the controller speed and transmission modeChanging the gateway address Using the main menu Configuring time zone settingsConfiguring date and time settings Viewing current network address settings Starting the appliance Checking the status of the Server and ManagerStopping the appliance Viewing and maintaining versions of the software Installing a new version of the appliance software Application upgrade OS/Application upgrade Patch upgradeRunning a different version of the appliance software Deleting a version of the appliance software Clearing statistics Halting the System Rebooting the System Using the config menu Resetting to factory settingsPreparing a cache disk Setting general controls Configuring Http options Configuring protocol options Configuring Nntp options Conﬁguring Nntp servers Tag Description Following table describes the tags you can use in a rule Tag Description Examples Conﬁguring Nntp access If access is Authenticator is User is Pass is Following table lists the access directive options Configuring FTP options Configuring Secure Socket Layer SSL port Primary Destination Allowed Value Setting filter rules Action Value Secondary Specifier Allowed Value Setting remap rules Target Enabling caching for different protocols Configuring the cache Setting object freshness options Setting disk storage options Following table shows the options Configuring caching rules Request URL method use one of the following Destip=112.12.12.12 scheme=ftp action=never-cache Controlling client access to the appliance Configuring security options Controlling access to the Manager UI Configuring and maintaining ICP peers Configuring routing optionsViewing and modifying ICP rules Following table describes each ﬁeld Mcttl Example Enabling and disabling ICP Viewing current ICP settings Setting the ICP query timeout Setting the ICP port numberEnabling and disabling multicast in ICP Controlling parent proxy caching Action Tag Allowed Value Secondary Specifiers Allowed Value Action Tag Allowed Value Configuring Wccp options Enabling and disabling transparent redirection Configuring the Adaptive Redirection Module ARM Rule Description Configuring ARM bypass rules Rule Format Bypass rules have the following format Configuring load-shedding options Configuring the host database options Option Description Configuring logging options Progress Using the monitor menuViewing Node statistics Statistic Description Cache Statistics Description Viewing Protocol statisticsStatistic Description Network Server Statistics Description Client Statistics Description Operations Originating Statistics Description QueriesFrom this Node From ICP Peers Viewing Cache statistics Viewing Other statistics Statistic Description Using the expert menu Using the load menu Using the save menuUsing the logoff menu Troubleshooting Problems Rebooting your system from the CLI Rebooting your system Upgrading software Page Appendix a Caching Solutions and Performance Day in the life of a cache request Web proxy caching Cache miss Ensuring cached object freshness Last-Modiﬁed / Date header test Revalidating objectsHttp object freshness tests Expires header test Deciding whether to serve Http objects Default testRevalidate rules Configuring Http revalidation Configuring Http freshness options Caching Http alternates Configuring Http cachabilityTo cache or not to cache? Directive source Caching directives Transparent proxy caching Interception strategies Serving requests transparently Using a layer 4-aware switch to filter transparency requests Using a WCCP-enabled router for transparency Using policy-based routing to filter transparency requests ARM redirection Using a router to ﬁlter Http requests Appliance adaptive bypass Adaptive interception bypassMore about bypass rules Destination bypass Configuring bypass optionsStatic and dynamic adaptive bypass Source bypass Server acceleration How server acceleration works Advantages of server accelerationRetrieving requested documents Whereas the corresponding proxy request would look like this Web server redirects Understanding server acceleration mapping rules User Request Translated Request Examples of rules and translations User Request Origin Server Header Translated Header Http cache hierarchies Understanding cache hierarchies Miss ICP cache hierarchies Bombay Nntp cache hierarchies News article caching Appliance as a caching proxy news server Appliance as a news serverSupporting several parent news servers Several servers supplying different groups Blocking particular groupsClustering Several news servers supplying the same groups Pull the overview information for speciﬁed groups Maintaining the cache updates and feedsTransparency Posting Take a partial feed push for speciﬁed groups Configuring Access controlPull the articles for speciﬁed groups Dynamically subscribe to speciﬁed groups Carrier-class architecture Self-tuning DataFlow coreObeying Nntp control messages Client bandwidth throttling Fast space reclamation Fine-grained parallelismRaw-disk object store Alias-free caching Fast kernel packet engine AlarmsAdvanced protocol features High-availability Monitor Dashboard Virtual IP failover Expansion capabilities Node fault toleranceLoad shedding Centralized administration Client ACL Page Appendix B Error Messages Title Code Description Html messages sent to clients Appendix B Error Messages 153 Message Description Standard Http response messages Appendix B Error Messages 155 Page Glossary DNS ISP POP Wccp Page Index News server features