SnapGear 2.0.1 - Manual (Page 89)

Firewall
85
Web lists
Access will be denied to any web address (URL) that contains text entered in the Block
List, e.g. entering xxx will block any URL containing xxx, including
http://xxx.example.com or www.test.com/xxx/index.html .
The Allow List also enables access to URLs containing the specified text.
Figure 6-11