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Caching on the Windows Platform

Matthew Cookhttp://escarpment.net/

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Introduction

Loughborough Universityhttp://www.lboro.ac.uk/computing/

Janet Web Cache Servicehttp://wwwcache.ja.net/

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Caching on the Windows Platform

• Caching Software

• Proxy Server II

• ISA Server

• The Future

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Caching Software

• Proxy Server II

• ISA Server

• Wingate

• Netscape Proxy Server

• Delegate

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Proxy Server II

• Features

• Installation Requirements

• System Configuration

• Access Control

• Non-cacheable Content

• Troubleshooting

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Features

• Web Proxy Server

• Winsock Proxy Server

• SOCKS Proxy Server

• Active Caching (Refreshing)

• Basic Access Control

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Installation Requirements

• Windows NT 4.0 Server

• Windows 2000 Server (with Service Pack 1)

• Internet Information Server 4.0 or 5.0

• NTFS Partition(s)

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System Configuration

• IIS is a pre-requisite

• Ensure latest service pack is applied

• Ensure Operating System is patched• Configuration notes available at

URL: http://wwwcache.ja.net/servers/proxy/

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Access Control

• Restrict access using the LAT

• Permissions tab works in the same way as NTFS ACLS

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Non-cacheable Content

• Cannot route direct to origin server

• Need to use a proxy-autoconfig script• Configuration details for creating a

proxy.pac are available on the wwwcache.ja.net websiteURL: http://wwwcache.ja.net/servers/proxy/directip.html

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Troubleshooting

• Event Viewer

• Microsoft Tech NET

• Proxy Server FAQ• Corrupt cache disc

URL: http://support.microsoft.com/support/kb/articles/Q242/2/85.ASP

• support@wwwcache.ja.net

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ISA Server

• Features

• Installation Requirements

• System Configuration

• Access Control

• Non-cacheable Content

• Troubleshooting

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Features

• Active Caching (Refreshing)

• Scheduled Content Download (Pre-fetching)

• Reverse Caching

• Transparent Re-direction of HTTP requests

• Upstream routing rules• CARP (Cache Array Routing Protocol)

[Microsoft CARP is not the same as Squid’s]

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Installation Requirements

• Windows 2000 Server

• or .NET Server (with Service Pack 1)

• NTFS Partitions

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System Configuration

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Access Control

• Schedules

• Destination Sets

• Client Address Sets

• Protocol Definitions

• Content Groups

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Destination Sets

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Non-cacheable Content

• File-types managed through Content Groups

• Routing Rules can send traffic directly to the origin site (Not via JWCS)

• Routing Rules can route content to not be cached locally

• Routing Rules can be applied to Destination Sets.

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Non-cacheable Content…

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Troubleshooting

• Service Pack problems• SP1(a) Released 24th January 2002• Version 3.0.1200.166.

Service Pack 1 Fixes• All hot fixes since ISA released• Improved admin tools• .NET server support• Security fixes from 3rd party auditors

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The Future

• Proxy Server II is now legacy software

• ISA Server add-ins and service packs

• .NET Server (Is Windows now suitable?)

• Streaming Media

• Content Distribution

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.NET Server

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.NET Server…

Web Server

StandardServer

EnterpriseServer

DatacenterServer

RAM 2Gb 4Gb 64Gb 128Gb

CPU 2 2 8 32

Cluster N/A N/A 4 node 8 node

64-bit N/A N/A Yes Yes

Notes WWW SOHO Large Site OEM Only

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.NET Server…

Mainly improvements in AD and Management

• Blank passwords at console only

• Improved command line tools

• Evaluating Security on build 3590

• IIS Currently secure from install

• Auditing enabled by default

• Integrated change log

• XML Output

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.NET Server…

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.NET Server…

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.NET Server…

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.NET Server…

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.NET Server…

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Questions