3Com Webcache 3000 (3C16116) manual What is Access, Logging?, off-the-shelf log analysis tools

What is Access Logging? 79

preventing you from using the Web interface.You can regain access by either:

■ Changing the client machine’s browser settings to remove the use of the Webcache as a proxy or

■ Using a browser on a client machine whose IP address is not blocked by Web Client Blocking to access the Web Interface.

	CAUTION: If you are using Browser Auto-Configuration Files to configure
	your client machine Web browser settings, and you are using Web Client
	Blocking to control access to the Internet, you should ensure that Go
	Direct if no Webcache Available is not checked in the Browser
	Auto-Configuration screen. If this box is checked, the Web browser will
	bypass the Webcache entirely after reading the Browser
	Auto-Configuration file, and will never be blocked. For more information,
	see “Proxy Auto Configuration (PAC) File Scripts” on page 50.
What is Access	Access Logging allows you to track which client machines have accessed
Logging?	which Web sites through the Webcache. By default Access Logging is
	disabled. If you enable Access Logging you must specify a FTP server that
	you want to periodically save the log to. The log is saved to the FTP server
	whenever the log is approaching full, or every 6 hours, whichever comes
	first. You can see a complete history of every web request made through
	the Webcache by combining all the FTPed logs; the saved logs are based
	on the standard Squid access log format and can be analyzed using
	off-the-shelf log analysis tools.
	An SNMP trap is automatically generated if the Webcache fails to save
	the access log to the FTP server.
	The access logs contain the following fields:
	Table 10 Access Log Fields
	Field	Description
	Time	A timestamp expressed as Coordinated Universal Time (UTC) with a
		millisecond resolution.
	Elapsed	The amount of time in milliseconds that the Webcache took to serve
		the request.
	Client	The IP address of the requesting client machine.

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