LevelOne WGR-8031 User Manual page 241

3. Check the option Enable Port Filtering to enable the port
filtering.
4. Enter 53 and 53 in Port Range field.
5. From the Protocol drop-down list, select UDP setting.
6. Enter DNS Resolve in Comment field.
7. Click Save & Apply.
8. Now the port filter that you created has been added and
listed in the Current Filter Table.
9. Now the UDP port 80 for both Outbound and Inbound
packet has been denied.
Now you cannot visit any web site by domain due to the UDP
port 53 has been blocked by the Port Filtering rule that created.
You can enter the IP Address of that web site to visit.
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