Technical Reference
OPEN824RL / RLW ADSL / VoIP Routers
71
Field Definition
Keywords Filtering
This allows blocking by specific keywords within a particular URL rather than having to
specify a complete URL (e.g. to block any image called “advertisement.gif”). When enabled,
your specified keywords list will be checked to see if any keywords are present in URLs
accessed to determine if the connection attempt should be blocked. Please note that the
URL filter blocks web browser (HTTP) connection attempts using port 80 only.
For example, if the URL is
, it will be dropped as the keyword
abcde
occurs in the URL.
Domains Filtering
This function checks the domain name only, (not the IP address) in URLs accessed against
your list of domains to block or allow. If it is matched, the URL request will be sent (Trusted)
or dropped (Forbidden). For this function to be activated, both check boxes must be checked.
The checking procedure is: Check the domain in the URL to determine if it is in the trusted
list. If yes, the connection attempt is sent to the remote web server.
If not, check if it is listed in the forbidden list, and if present then the connection attempt is
dropped. If the packet does not match either of the above two items, it is sent to the remote
web server. Note that the domain only should be specified, not the full URL. For example, to
block traffic
, enter
sex
or
sex.com
instead of
In the example
below, the URL request for
will be sent to the remote web server because it is
listed in the trusted list, whilst the URL request for
or
will be dropped,
because sex.com is in the forbidden list.
This function enhances the restriction to your URL rules.
Restrict URL Features
Block Java Applet
This function can block web content that includes the Java Applet. It is
to prevent someone who wants to damage your system via standard
HTTP protocol.
Block surfing by IP
address
Preventing someone who uses the IP address as URL for skipping
Domains Filtering
function. Activates only and if
Domain Filtering
enabled.
Example:
Andy wishes to disable all WEB traffic except for ones listed in the trusted domain, which would
prevent Bobby from accessing other web sites.
