Clearing the DNS Cache | Blue Coat Systems SGOS Version 5.2.2

Volume 9: Managing the Blue Coat SG Appliance

To restore system defaults:

Note: The keep-consoleand factory-defaultsoptions are not available through the Management Console.

1.Select Maintenance > System and disks > Tasks.

2.From the Tasks field, click Restore the configuration to defaults. If you restore the configuration from the Management Console, most settings are lost because you cannot use the keep-console option.

The Restore Configuration dialog appears.

3.Click OK.

Related CLI Syntax to Restore System Defaults

SGOS# restore-defaults [keep-console]

SGOS# restore-defaults [keep-console] force

SGOS# restore-defaults factory-defaults

Clearing the DNS Cache

You can clear the DNS cache at any time. You might need to do so if you have experienced a problem with your DNS server or if you have changed your DNS configuration.

To clear the DNS cache:

1.Select Maintenance > System and disks > Tasks.

2.In the Tasks field, click Clear next to “the DNS cache.”

3.Click OK to confirm in the Clear system DNS cache dialog that appears.

Related CLI Syntax to Clear the DNS Cache

SGOS# clear-cache dns-cache

Clearing the Object Cache

You can clear the object cache at any time.

When you clear the cache, all objects in the cache are set to expired. The objects are not immediately removed from memory or disk, but a subsequent request for any object requested is retrieved from the source before it is served.

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Blue Coat Systems SGOS Version 5.2.2 manual Clearing the DNS Cache, Clearing the Object Cache, To restore system defaults

Contents

Blue Coat Systems SG Appliance Contact Information Contents Diagnostics Appendix a Glossary Index Volume 9 Managing the Blue Coat SG Appliance About Managing the SG Appliance Document Conventions Volume 9 Managing the Blue Coat SG Appliance Using Director to Manage SG Systems Automatically Registering the SG Appliance with Director Related CLI Commands for Director Registration Director Registration RequirementsRegistering the SG Appliance with Director To register the appliance with a Director Setting up Director and SG Appliance Communication To view the fingerprint of the key Monitoring the System and Disks System SummaryTo delete a key To view the system summary statistics Viewing System Environment Sensors To view the system environment statistics Viewing Disk Status To view disk status or take a disk offline Setting Up Event Logging and Notification Configuring Which Events to LogViewing SSL Accelerator Card Information To view SSL accelerator cards Setting Event Log Size Related CLI Commands for Setting the Event Logging LevelRelated CLI Commands to Set the Event Log Size Enabling Event Notification To enable event notifications Related CLI Commands to Enable Event NotificationsSyslog Event Monitoring Viewing Event Log Configuration and Content Viewing the Event Log ConfigurationTo enable syslog monitoring Related CLI Commands to Enable Syslog Monitoring Viewing the Event Log Contents Configuring Snmp To enable and configure SnmpRelated CLI Commands to Enable and Configure Snmp Enabling Snmp Configuring Snmp Community Strings To set or change community strings Configuring Snmp Traps To enable Snmp trapsRelated CLI Commands for Enabling Snmp Traps Configuring Health Monitoring Health Monitoring Requirements About the Health Monitoring Metric Types About Health Monitoring Health Monitoring Example About License Expiration Metrics About Health Monitoring Notification About the General MetricsAbout the Licensing Metrics About the Status Metrics Metric Threshold States and Corresponding Values Changing Threshold and Notification Properties To change the threshold and notification properties Getting a Quick View of the SG Appliance Health Viewing Health Monitoring Statistics To review the health monitoring statistics Troubleshooting Related CLI Syntax to View Health Monitoring Statistics Volume 9 Managing the Blue Coat SG Appliance Restarting the SG Appliance Hardware and Software Restart OptionsTo restart the SG appliance Restoring System Defaults Restore-Defaults Factory-Defaults Keep-Console To restore system defaults Clearing the DNS CacheClearing the Object Cache To clear the DNS cache Troubleshooting Tip Clearing the Byte CacheClearing Trend Statistics Upgrading the SG Appliance SG Appliance 5.x Version Upgrade To upgrade the SG appliance Related CLI Syntax to Upgrade the Sgos Software To view Sgos system replacement options Managing SG Appliance SystemsTo view details for an Sgos system version Setting the Default Boot System Example SessionTo set the SG appliance to run on the next hardware restart Locking and Unlocking SG Appliance Systems Replacing an SG Appliance SystemTo lock a system To unlock a system Deleting an SG Appliance System Disk ReinitializationMulti-Disk SG Appliances To delete a system Single-Disk SG Appliance Deleting Objects from the SG ApplianceTo delete a single object from the SG appliance To delete multiple objects from the SG appliance Diagnostics Diagnostic Reporting Service Information Sending Service Information AutomaticallyTo send service information automatically Managing the Bandwidth for Service Information Related CLI Syntax to Send Service InformationTo manage bandwidth for service information Configure Service Information Settings To send service information SGOS#diagnostics service-info subcommands Creating and Editing Snapshot Jobs To create a new snapshot jobTo edit an existing snapshot job Following subcommands are available Related CLI Syntax to Edit an Existing Snapshot Job Packet Capturing the Job Utility Pcap File Name FormatCommon Pcap Filter Expressions Configuring Packet Capturing Using Filter Expressions in the CLI To enable, stop, and download packet captures Diagnostics Related CLI Syntax to Define Packet Capturing Settings Viewing Current Packet Capture Data To configure core image restart options Core Image Restart OptionsUploading Packet Capture Data To view current packet capture statistics Diagnostic Reporting Heartbeats To set daily heartbeats and/or Blue Coat monitoringRelated CLI Syntax to Manage Heartbeats and Monitoring Diagnostic Reporting CPU Monitoring To configure and view CPU monitoringRelated CLI Syntax to Configure and View CPU Monitoring Volume 9 Managing the Blue Coat SG Appliance Statistics Selecting the Graph Scale Viewing Traffic Distribution Statistics Traffic Mix Understanding Chart Data Refreshing the DataAbout Bypassed Bytes About the Default Service Statistics Viewing Bandwidth Usage or GainTo view bandwidth usage or gain statistics Viewing Client Byte and Server Byte Traffic Distribution Viewing Traffic HistoryTo view client and server byte statistics Supported Proxy Types and Services Unsupported Proxy Types Viewing the ADN History Viewing Bandwidth Management StatisticsViewing Protocol Statistics To view client and server byte or bandwidth gain statistics SSL History Viewing System Statistics Resources StatisticsViewing CPU Utilization To view CPU utilization Viewing Concurrent Users To view concurrent users Viewing Disk Use Statistics Viewing Memory Use StatisticsTo view disk use statistics To view memory use statistics Viewing Data Allocation Statistics in RAM and on Disk To view data allocation statistics Contents Statistics Event Logging Statistics To view the event log Failover Statistics Active Sessions-Viewing Per-Connection StatisticsTo view failover statistics Analyzing Proxied Sessions Viewing Proxied SessionsAbout the Proxied Sessions Statistics To view proxied sessions Provided. See Viewing Sessions with Multiple Connections on Cache Hit Is unavailable if the content is non-cacheable or for Cifs Using the Tool Tips About MMS Streaming ConnectionsViewing Sessions with Multiple Connections Understanding the Tree View MMS What Is Not Displayed Filtering the DisplayAbout the Byte Totals Viewing Html and XML Views of Proxied Sessions Data Analyzing Bypassed Connections Statistics Viewing Bypassed Connections About the Bypassed Connection StatisticsTo view bypassed connections 14. Filter Drop-Down List Viewing the Access Log Viewing Html and XML Views of Bypassed Connections DataViewing Health Monitoring Statistics Viewing Health Check Statistics Using the CLI show Command to View Statistics Statistics Volume 9 Managing the Blue Coat SG Appliance Appendix a Glossary URL Appendix a Glossary Drtr Icmp Volume 9 Managing the Blue Coat SG Appliance MACH5 MIB NTP 100 Network Tunneling tab 102 103 104 Index 106 Snmp 108