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138 Intel NetStructure Cache Appliance Administrator’s Guide
News article caching
The Intel NetStructure Cache Appliance can function as a news server or a
caching news server. News, also known as USENET and discussions, is a system
of online discussion groups. NNTP is the protocol used to retrieve and distribute
these discussion groups. The appliance supports NNTP as specified in RFC 977
and many common and proposed extensions.
To read news articles, users need a news reader, such as Netscape Communicator
or Microsoft Internet Explorer, and access to a news server. The appliance is a
caching news server. It can be configured to sit transparently between users and a
parent or backing news server, increasing responsiveness for the user and
decreasing network bandwidth use and the load on the parent news server.
Figure 9 Intel NetStructure Cache Appliances caching news articles for a distant
NNTP server
The appliance provides many options that you can configure for supporting
parent NNTP servers. The rest of this section describes the appliance’s NNTP
features.
Parent
NNTP
Server
Intel NetStructure
Cache Appliance
users
users
Intel NetStructure
Cache Appliance
- Administrator’s Guide 1
- Contents 3
- Contents v 5
- Contents vii 7
- Contents ix 9
- Who should read this manual 12
- Chapter 1 13
- How to use this guide 17
- Chapter 2 19
- Accessing the Manager UI 24
- Chapter 2 Getting Started 13 25
- Figure 1 The Dashboard page 25
- Using online help 27
- Verifying that caching works 27
- Changing passwords 27
- Chapter 3 29
- Accessing monitor pages 30
- Using the Dashboard page 30
- Dashboard alert lights 31
- Exposing node detail 31
- Changing the selected node 32
- Using the Node page 32
- Using the Graphs page 33
- Using the Protocols page 33
- Using the Cache page 33
- Using the ARM page 33
- Using the Other page 34
- Using the MRTG page 34
- Chapter 4 35
- Accessing configure pages 36
- Using the Server Basics page 36
- Setting general options 37
- Configuring load-shedding 40
- Enabling SNMP agents 41
- Configuring HTTP 42
- Configuring NNTP 43
- Configuring FTP 46
- Cache activation 47
- Freshness 48
- Variable content 50
- Using the Security page 51
- Using the Routing page 51
- Setting ICP options 53
- Checking transparency 56
- Checking WCCP 56
- Using the Host Database page 56
- Configuring the host database 57
- Configuring DNS 59
- Using the Snapshots page 59
- Chapter 5 61
- Using the setup menu 64
- Changing the gateway address 65
- Using the main menu 66
- Starting the appliance 67
- Stopping the appliance 67
- Application upgrade 69
- Patch upgrade 70
- OS/Application upgrade 70
- Clearing statistics 71
- Rebooting the System 72
- Halting the System 72
- Resetting to factory settings 73
- Preparing a cache disk 73
- Using the config menu 73
- Setting general controls 74
- Configuring protocol options 75
- Configuring NNTP options 76
- Configuring FTP options 83
- Setting filter rules 84
- Setting remap rules 86
- Configuring the cache 88
- Setting disk storage options 89
- Configuring caching rules 91
- Configuring security options 94
- Configuring routing options 96
- Configuring WCCP options 104
- Configuring ARM bypass rules 106
- Configuring logging options 110
- Using the monitor menu 111
- Viewing Node statistics 111
- Viewing Protocol statistics 112
- ICP peers 115
- Viewing Cache statistics 116
- Viewing Other statistics 117
- Using the expert menu 119
- Using the save menu 120
- Using the load menu 120
- Using the logoff menu 120
- Chapter 6 121
- Rebooting your system 122
- Upgrading software 123
- Appendix A 125
- Web proxy caching 126
- Revalidating objects 128
- HTTP object freshness tests 128
- Configuring HTTP revalidation 130
- Caching HTTP alternates 131
- To cache or not to cache? 131
- Transparent proxy caching 132
- Interception strategies 133
- Internet 134
- Cache Appliances 135
- Adaptive interception bypass 138
- Configuring bypass options 139
- NetStructure 140
- Appliance 140
- How server acceleration works 141
- Web server redirects 143
- HTTP cache hierarchies 147
- Peer 148
- How an ICP 149
- News article caching 150
- Blocking particular groups 152
- Clustering 152
- Transparency 153
- Configuring Access control 154
- Obeying NNTP control messages 155
- Client bandwidth throttling 155
- Carrier-class architecture 155
- Performance 155
- High-availability 157
- Virtual IP failover 158
- Node fault tolerance 159
- Expansion capabilities 159
- Centralized administration 160
- Appendix B 163
- HTML messages sent to clients 164
- Glossary 169
- Glossary 159 171
- Glossary 161 173
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