HP SuperStack Firewall Series Uživatelský manuál stáhnout pdf (Strana 73)

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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HP SuperStack Firewall Series Uživatelský manuál Strana 73