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Contents vii
Understanding cache hierarchies .........................................................135
HTTP cache hierarchies................................................................. 135
ICP cache hierarchies ....................................................................136
NNTP cache hierarchies ................................................................ 137
News article caching............................................................................. 138
The appliance as a news server ....................................................139
The appliance as a caching proxy news server ............................. 139
Supporting several parent news servers........................................139
Blocking particular groups..............................................................140
Clustering .......................................................................................140
Transparency ................................................................................. 141
Posting ........................................................................................... 141
Maintaining the cache: updates and feeds..................................... 141
Configuring Access control ............................................................142
Obeying NNTP control messages..................................................143
Client bandwidth throttling..............................................................143
Carrier-class architecture .....................................................................143
Performance................................................................................... 143
High-availability ..............................................................................145
Node fault tolerance .......................................................................147
Expansion capabilities.................................................................... 147
Centralized administration.............................................................. 148
Appendix B Error Messages 151
HTML messages sent to clients ...........................................................152
Standard HTTP response messages ...................................................154
Glossary 157
Index 163
List of
Procedures
Initially configuring and starting your system............................................ 8
Accessing the Manager UI .....................................................................12
Reaching Monitor pages.........................................................................18
Reaching the Dashboard page............................................................... 18
Changing the selected node................................................................... 20
Reaching the Node Page .......................................................................20
Reaching the Graphs page.....................................................................21
Reaching the Protocols page .................................................................21