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A URL Blocking List can be any ASCII text file containing the header URL Blocking Import File and these sections:
[block]
[allow]
Note: Approved lists using the [approved] format cannot be imported. Blocked and allowed lists using the [blocked] and [allowed] formats can be imported.
There is no limit to the number of URLs you can include in a block list. There is no need to include http:// or https:// in the URL (it is automatically stripped). Delimit separate Web addresses, URLs, and/or strings using a line break. Block-lists support the following * and ? wildcards.
URL Blocking Import File
www.source-of-sudden-new-outbreak.com
www.known-phish-site.com/*
www.jobsearch.com
/intranet.yourcompany.com/*
[approved]
*www.partner-site.com/*