Red Hat NETWORK PROXY SERVER 3.7 - Bedienungsanleitung PDF herunterladen (Seite 34)

24 Conﬁguring Your Secure Web Server

uncomment the Cache directives to enable proxy caching for your

proxy server. Apache proxy serving is enabled by the

proxy module which was compiled in and loaded with your web

server by default.

Cache directives A number of cache directives are commented out in

your httpd.conf ﬁle. If you are using the proxy server function-

ality, you should uncomment these directives to enable the proxy

cache. The default settings for your cache directives should be ap-

propriate for most conﬁgurations.

CacheRoot CacheRoot sets the name of the directory which will con-

taincachedﬁles. ThedefaultCacheRoot setis/var/cache/httpd.

CacheSize CacheSize sets how much space the cache can use, in KB.

The default CacheSize is 5 KB.

CacheGcInterval CacheGcInterval setsanumber ofhours. Afterthat

numberofhours, ﬁles in the cache will be deletedifthecacheisusing

more space than allowed by CacheSize. The default for

CacheGcInterval is four hours.

CacheMaxExpire Cached HTML documents will be retained (without a

reload from the originating web server) in the cache for a maximum

number of hours set by CacheMaxExpire. The default is 24 hours.

CacheLastModiﬁedFactor TheCacheLastModifiedFactor affectsthe

creation of an expiry date for a document which did not come from

its originating server with its own expiry set. The default

CacheLastModifiedFactor is set to 0.1, meaning that the ex-

piry date forsuch documentsequals one-tenth ofthe amount oftime

since the document was last modiﬁed.

CacheDefaultExpire CacheDefaultExpire istheexpirytime in hours

for a document that was received using a protocol that doesn’t sup-

port expiry times. The default is set to one hour.

NoCache Any document that is retrieved from a host and/or domain

that matches one set in NoCache will not be cached.

VirtualHost <VirtualHost> and /VirtualHost> tags surround any

conﬁguration directiveswhich areintended toapply toa virtual host

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Red Hat NETWORK PROXY SERVER 3.7 - Bedienungsanleitung Seite 34