3Com SUPERSTACK 3CR16110-95, Руководство пользователя, Страница: 74 / 214

74 C
HAPTER
5: S
ETTING UP
W
EB
F
ILTERING
Downloading an
Updated Filter List
Download Now
Click this button to download and update the Web Site Filter
immediately. This process may take a couple of minutes, depending on
Internet traffic conditions and requires a valid subscription to the Web
Site Filter.
Automatic Download
Check this box to enable automatic, weekly updates to the Web Site
Filter. Also, select the day of the week and the time of the day to
download the new list. A valid Web Site Filter subscription is required.
Setting Actions if no
Filter List is Loaded
There are two radio buttons that determine what happens if the Filter List
expires or if a download of a Filter List fails:
Block traffic to all websites except for Trusted Domains
Select this option if only access to Trusted Domains should be available in
the event of the Filter List expiring or a download failing. See “Setting up
Trusted and Forbidden Domains” on page 71 for more information.
Allow traffic to all websites
Select this option to provide open access to the internet in the event of
the Filter List expiring or a download failing.
Since it is necessary to restart the Firewall once the download is
complete, which causes a momentary interruption of Internet access, it is
a good idea to download new lists when LAN access to the Internet is at
a minimum.
Click Update to save your changes.
Once loaded, the creation date of the current active list is displayed at the
top of the window.
Each download of the Web Site Filter expires 30 days after it is
downloaded. The Filter List may also be erased if the Firewall fails to
download a new list. If the Filter List expires or is erased, the Firewall may
be configured to block all Web Sites except for Trusted Domains, or to
allow access to all Web Sites.
DUA1611-0AAA02.book Page 74 Thursday, August 2, 2001 4:01 PM