Appendix B Error Messages 153 | Intel 1520 manual

	HTTP
Title	code	Description

Host Header Required	400	An attempt was made to transparently
		proxy your request, but this attempt failed
		because your browser did not send an
		HTTP “Host” header. Please manually
		configure your browser to use http://
		<proxy_name>:<proxy port>
		as an HTTP proxy. Please refer to your
		browser’s documentation for details.
		Alternatively, end users can upgrade to a
		browser that supports the HTTP “Host”
		header field.

Host Header Required	400	Your browser did not send a Host HTTP
		header field and therefore the virtual host
		being requested could not be determined.
		To access this web site correctly, you will
		need to upgrade to a browser that
		supports the HTTP Host header field.

HTTP Version Not	505	The web server <server name> is
Supported		using an unsupported version of the
		HTTP protocol.

Invalid HTTP Request	400	Could not process this <client
		request HTTP method> request for
		<URL>.

Invalid HTTP Response	502	The host <server name> did not return
		the document <URL> correctly.

Malformed Server	502	The host <server name> did not return
Response		the document <URL> correctly.

Malformed Server	502	The host <server name> did not return
Response Status		the document <URL> correctly.

Maximum Transaction	504	Too much time has passed transmitting
Time exceeded		document <URL>.

No Response Header	502	The host <server name> did not return
From Server		the document <URL> correctly.

Not Cached	504	This document was not available in the
		cache, and you (the client) only accept
		cached copies.

Not Found on Accelerator	404	The request for <URL> on host <server
		name> was not found. Check the location
		and try again.

NULL	502	The host <host name> did not return
		the document <URL> correctly.

Appendix B Error Messages

153

Image 165

Intel 1520 manual Appendix B Error Messages 153

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 Conventions used in this manual Who should read this manualConvention Purpose Bold Introduction Chapter Why use this caching appliance? What is an Intel NetStructure Cache Appliance?Flexible cache architecture Web proxy cache Intel NetStructure Cache Appliance features Multithreading process support Secure, single-point administrationHigh-speed caching Broad protocol support Snmp Network Management How to use this guidePerformance reporting To find out about … See …Page 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 Accessing the command-line interface Using online helpChanging passwords Verifying that caching worksPage Monitoring Appliance Performance Using the Dashboard Accessing monitor pages Dashboard alert lights Resolving alarmsExposing node detail Alert light Condition Description Changing the selected node Using the Node Using the Protocols Using the GraphsUsing the Cache Using the ARM Using the Mrtg Using the Other Configuring the Appliance Using the Server Basics Accessing configure pages Setting general options NetStructure Cache sectionOption Description Setting virtual IP addressing options Setting Web management optionsUsing virtual IP addressing for node failover What are virtual IP addresses? Adding entries to the Virtual IP address list Setting browser auto configuration options Setting throttling of network connectionsConfiguring 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 Security Using the RoutingLink 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 Using the Host Database Checking transparencyChecking 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 Starting the command-line interface Using the appliance after initial start-upStarting 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 controller speed and transmission mode Changing the DNS address and domain nameChanging the gateway address Configuring date and time settings Configuring time zone settingsViewing current network address settings Using the main menu Checking the status of the Server and Manager Starting the applianceStopping the appliance Viewing and maintaining versions of the software Installing a new version of the appliance software Application upgrade Patch upgrade OS/Application upgradeRunning a different version of the appliance software Deleting a version of the appliance software Clearing statistics Halting the System Rebooting the System Resetting to factory settings Using the config menuPreparing 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 routing options Configuring and maintaining ICP peersViewing and modifying ICP rules Following table describes each ﬁeld Mcttl Example Enabling and disabling ICP Viewing current ICP settings Setting the ICP port number Setting the ICP query timeoutEnabling 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 Viewing Node statistics Using the monitor menuStatistic Description Cache Progress Statistic Description Viewing Protocol statisticsNetwork Statistics Description Server Statistics Description Client Statistics Description Operations Statistics Description Queries OriginatingFrom this Node From ICP Peers Viewing Cache statistics Viewing Other statistics Statistic Description Using the expert menu Using the save menu Using the load 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 Http object freshness tests Revalidating objectsExpires header test Last-Modiﬁed / Date header test Default test Deciding whether to serve Http objectsRevalidate rules Configuring Http revalidation Configuring Http freshness options Configuring Http cachability Caching Http alternatesTo 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 Adaptive interception bypass Appliance adaptive bypassMore about bypass rules Static and dynamic adaptive bypass Configuring bypass optionsSource bypass Destination bypass Server acceleration Advantages of server acceleration How server acceleration worksRetrieving 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 news server Appliance as a caching proxy news serverSupporting several parent news servers Clustering Blocking particular groupsSeveral news servers supplying the same groups Several servers supplying different groups Transparency Maintaining the cache updates and feedsPosting Pull the overview information for speciﬁed groups Pull the articles for speciﬁed groups Configuring Access controlDynamically subscribe to speciﬁed groups Take a partial feed push for speciﬁed groups Obeying Nntp control messages Self-tuning DataFlow coreClient bandwidth throttling Carrier-class architecture Raw-disk object store Fine-grained parallelismAlias-free caching Fast space reclamation Advanced protocol features AlarmsHigh-availability Fast kernel packet engine Monitor Dashboard Virtual IP failover Node fault tolerance Expansion capabilitiesLoad 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