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