Patent ID: 7397769
Filing Date: 2008-07-08
Classification: H04L

Abstract:
1. An ADSL modem for providing an IPoA, a PPPoA, or a PPPoE based dial-up networking service over Ethernet, comprising: a DHCP server coupled to at least one computer, wherein each computer uses a DHCP provided by an OS thereof to obtain an authorized IP address and associated settings from an ISP through the DHCP server, the DHCP server assigns the authorized IP address and the associated settings to each computer, and the DHCP server temporarily assigns a dedicated IP address, a gateway, and a DNS to each computer in response to the ADSL modem receiving a discovery packet from at least one computer coupled to a local network; a Web server; a PPP dial-up software; an ATM driver; an IP stack unit coupled to the DHCP server and the Web server respectively; and a bridge coupled to the IP stack unit and the PPP dial-up software, enabling the IP stack unit and the PPP dial-up software to connect with at least one computer in the local network through the bridge, and to connect with a PPPoA dial-up protocol, a PPPoE dial-up protocol and an IPoA dial-up protocol through the bridge respectively so that one of the PPPoA dial-up protocol, the PPPoE dial-up protocol, and the IPoA dial-up protocol is used to dial up for coupling to an ISP via the ATM driver, wherein in response to receiving an Ethernet packet from the computer, the ADSL modem checks whether the Ethernet packet is a DNS request packet, and if the Ethernet packet is the DNS request packet, the ADSL modem checks an Internet accessing mode of the computer sending the Ethernet packet, and if the Internet accessing mode is a dial-up mode, the ADSL modem identifies a user name and a password and performs the PPP dial-up software to access the Internet by dialing up the ISP via an ADSL line.