Library Category Components > URLs:

A library category can block a user's access to a specified site or service if the Internet address is entered in the URLs window. A URL can contain a domain name such as http://www.yahoo.com or an IP address such as http://216.109.118.77/. The asterisk (*) wildcard and period (.) can be used in the URL entry. For example: *.yahoo.com will block all URLs containing the text following the period and asterisk. A minimum of three wildcard levels can be entered (e.g. *.yahoo.com), up to a maximum of six wildcard levels, (e.g. *.mail.attachments.message.yahoo.com).

The following types of URL formats also can be entered in this window:
• octal format - e.g. http://0106.0125.0226.0322
• hexadecimal short format - e.g. http://0x465596d2
• hexadecimal long format - e.g. http://0x46.0x55.0x96.0xd2
• decimal value format - e.g. http://1180014290
• escaped hexadecimal format - e.g. http://%57%57%57.%41%44%
44%49%43%54%49%4E%47%47%41%4D%45%53.%43%4F%4D
• query string format - e.g. http://www.youtube.com/watch?=v=3_Wfnj1llMU

TIP: To use instant messaging, IP addresses for instant messaging services must be included in instant messaging categories maintained by the global administrator. When creating filtering profiles, specified instant messaging categories must be set up to be blocked. Users will be denied access to instant messaging services at any IP address set up to be blocked.

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