User manual

Network Setup
121
Check Enable ICAP functionality to enable the ICAP features of the SG unit's web
cache.
ICAP REQMOD server is the URL for an ICAP server's REQMOD service. This allows
an ICAP server to modify web transaction requests, i.e. to process as they are being
initially requested by the LAN PC, e.g. for URL filtering. It must begin with icap://, e.g.:
icap://192.168.0.10:1344/reqmod
ICAP RESPMOD server is the URL for an ICAP server's RESPMOD service. This
allows an ICAP server to modify web transaction responses, i.e. to process traffic that is
returned from an external web server, e.g. for virus scanning. It must begin with icap://,
e.g.: icap://192.168.0.10:1344/respmod
You may choose to Bypass ICAP server if uncontactable. If the ICAP server is not
responding to requests, web transactions are allowed as normal. If this is option
disabled, all web transactions are blocked until the ICAP server becomes contactable.
Advanced
Click Advanced then Advanced again to modify the advanced settings of the web
cache.
You may specify the TCP network Port that the web cache listens on, this is usually 3128
or 8080.
Extra diagnostic output may be displayed in the system log in addition to the usual
cache log file.
Objects larger than the Maximum cached object size (KB) are NOT be cached. If you
wish to get a high BYTES hit ratio, you should probably increase this (one 32 MB object
hit counts for 3200 10KB hits). If you wish to increase speed more than your want to
save bandwidth you should leave this low.