How to do it...

1. Navigate to Interfaces | WAN.
2. Check the Enable Interface checkbox (it should be checked by default):

1. Choose an IPv4 Configuration Type (usually DHCP).
2. Choose an IPv6 Configuration Type, or leave it set to None.
3. Leave MAC Address blank. Manually entering a MAC address here is known as MAC address spoofing. You can enter a MAC address here if you want to force your ISP to hand you a different IP address, or a different set of DNS servers. Be warned, however, that the MAC address entered must have a valid manufacturer’s prefix or it won’t work.
4. Leave MTU, MSS, Hostname, and Alias IP address blank.

1. Check the Block private networks and loopback addresses checkbox (it should be checked by default). This will block RFC 1918 private addresses from being sent out over the public internet.
2. Check the Block bogon networks checkbox (it should be checked by default). This will block packets from IP addresses not yet assigned by IANA from being sent or received:

1. Click on the Save button when done.