User Interface
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GP-U/GP-E/GP-S/GP-T
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User Manual 3646.3836.02 ─ 01
Click " Activate" in the toolbar at the top of the desktop to apply your configuration
changes.
3.4.6.2
URL/Content Filter
URL and content filters determine which websites are available to computers on the
protected network.
The URL filter function of your gateprotect Firewall checks Internet addresses (URL,
Uniform Resource Locator consisting of server name, path and filenames) received in
the HTTP traffic for allowed and/or not allowed terms according to their classification in
the black- and whitelists.
A »blacklist« approach defines a list of sites to block and grants access to all sites that
have not been explicitly forbidden. For example, if the URL of a website is on a black-
list, access to this site is blocked. Therefore, with the category "Ordering" being black-
listed, the URL
http://www.amazon.de
is blocked.
A »whitelist« approach can be used to limit access to a list of sites that have specifi-
cally been approved for usage and block all others. For example, if the subcategory
"Shopping" is on the blocking list but you want to allow access to the URL
http://www.amazon.de
, this URL must be entered into a whitelist.
If websites do not contain any verifiable terms in their URLs, a URL filter on its own is
not enough. Therefore, the gateprotect Firewall also filters the HTTP data communica-
tion by the content of the websites. Similar to a search engine, the content filter
searches websites available on the Internet, analyzes and categorizes them and com-
piles the results in a database.
To use the URL and content filter, the HTTP proxy is essential. The HTTP data com-
munication of a connection can only be filtered by URL lists and content if the HTTP
proxy is activated for this connection in the rules editor.
The URL and content filters defined here are available for use in custom firewall rules
(see
Chapter 3.3, "Firewall Rule Settings"
on page 19 for further information).
For more detailed information on URL/content filters, see the following sections.
URL/Content Filter Settings
Navigate to "UTM > URL/Content Filter > Settings" to configure the URL and content
filter on your gateprotect Firewall.
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