Updating the Web Filter
73
Updating the Web
Filter
Since content on the Internet is constantly changing, make sure you
update the Web Site Filter used by the Firewall on a regular basis. When
you subscribe to the Web Site Filter, you can specify that it is updated
automatically every week for one year.
It is important to note that host names, and not IP addresses, are used for
all Internet filtering functions two reasons:
■
Many blocked sites operate server pools, where many machines
service a single host name, making it impractical and difficult to add
and maintain the numerical addresses of every server in the pool.
■
Many sites included in the Web Site Filter regularly change the IP
address of the server to try to bypass the Web Site Filters. This makes
maintaining a current list subscription critical for effective content
filtering.
Click
Filter
, and then select the
Filter Update
tab at the top of the
window. A window similar to that in Figure 31 displays.
Figure 31
Filter Update Window
Checking the Web
Filter Status
This section shows the status of the Web Site Filter and the date it was
last downloaded. If the Web Site Filter has not been downloaded the
Firewall displays a warning message in red text.
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Страница 96: ...96 CHAPTER 6 USING THE FIREWALL DIAGNOSTIC TOOLS DUA1611 0AAA02 book Page 96 Thursday August 2 2001 4 01 PM ...
Страница 122: ...122 CHAPTER 8 ADVANCED SETTINGS DUA1611 0AAA02 book Page 122 Thursday August 2 2001 4 01 PM ...
Страница 150: ...150 CHAPTER 10 CONFIGURING HIGH AVAILABILITY DUA1611 0AAA02 book Page 150 Thursday August 2 2001 4 01 PM ...
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Страница 166: ...166 CHAPTER 11 ADMINISTRATION AND ADVANCED OPERATIONS DUA1611 0AAA02 book Page 166 Thursday August 2 2001 4 01 PM ...
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Страница 178: ...178 CHAPTER 13 TYPES OF ATTACK AND FIREWALL DEFENCES DUA1611 0AAA02 book Page 178 Thursday August 2 2001 4 01 PM ...
Страница 190: ...190 CHAPTER 14 NETWORKING CONCEPTS DUA1611 0AAA02 book Page 190 Thursday August 2 2001 4 01 PM ...
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Страница 206: ...206 APPENDIX D TECHNICAL SUPPORT DUA1611 0AAA02 book Page 206 Thursday August 2 2001 4 01 PM ...
Страница 212: ...212 INDEX DUA1611 0AAA02 book Page 212 Thursday August 2 2001 4 01 PM ...
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