Billion BiPAC 7700N User Manual page 52

PPP Username: enter ISP account.
PPP Password: enter the password.
PPPoE Service name: user-defined name.
Authentication method: select the authentication method.
Enable Fullcone NAT: enable or disable fullcone NAT. Fullcone is a kind of NAT, in this mode, all
requests from the same internal IP address and port are mapped to the same external IP address
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