Url Filter; Alg - CNET CWR-901 User Manual

Ingress, Dest IP/Port: select the packet with an incoming destination IP.
Egress, Src IP/Port: select the packet with an outgoing source IP.
Ingress, Src IP/Port: select the packet with an incoming source IP.
- Type: Define the packet type – TCP, UDP or IP
- Port: Enter the port number.
- Day: Select the Day – Sun, Mon, Tue, Wed, Thu, Fri or Sat.
- Time: Define the Time range.
- Enable: Check the box and enable this ACL group.
- Apply: Save the parameters.
Reset: Click on "Reset" button to undo your changes.
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- Help: To request help information.

3.5.2 URL Filter

URL filter can identify URL strings inside any packet, with any TCP/UDP port number and filter
them. It provides eight entries and can filter packets by their source IP range.
- URL String pattern to be blocked: Enter the URL strings to be blocked.
Source IP range: Enter the Source IP range that you want to block the URL string.
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- Enable: Check the box and enable this URL condition.
- Apply: Save the parameters.
Reset: Click on "Reset" button to undo your changes.
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- Help: To request help information.

3.5.3 ALG

Some applications embed their IP and port information in their payload which is not NAT friendly.
An Application Layer Gateway (ALG) is a plug-in module on NAT firewall to masquerade such
application layer payloads.
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