PLANET CS-2001 - Manual (Page 587)

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Step 4. Go to Policy > Outgoing, click New Entry and then set as below:
（Figure
16-10）
 Select the defined group from the Web Filter drop-down list.
 Click OK.
（Figure 16-11）
 By applying this policy, only websites containing “yahoo” or “google”
in the domain name will be permitted.
Figure 16-10 Policy Setting for URL Blocking
Figure 16-11 Policy Created