- Remote access Address assignment is made possible by a special entry in the IP routing table. Along with the entry for the IP address to be assigned to the remote site from the 'Router name' field, the net mask is entered as 255.255.255.255. In this case, the router name is the name required for the remote site to authenticate with the device. This configuration involves the transmission of entries from the TCP/IP module, including the IP address and the addresses of the DNS and NBNS servers (Domain Name Server and NetBIOS Name Server), including the backup server. In order for everything to function properly, the remote site must also be set up to obtain the IP address and the name server from the device. In Dial-Up Networking under Windows, for example, this is done with the entries in the 'TCP settings' under 'IP address' and 'DNS configuration'. The options 'IP address assigned by server' and 'Specify name server addresses' are activated here.
- Internet access If the device is used to provide a local area network with Internet access, the assignment of IP addresses can take place the other way around. In some configurations the device itself does not have a valid IP address on the Internet, and instead it receives one from the Internet provider for the duration of the connection. During the PPP negotiation the devices receives the IP address and information about the DNS server at the provider. In the local network, the device is only known by its internal intranet address. This allows all of the workstations in the local network to access the same Internet account and, for example, reach the DNS server.
Windows users are able to view the assigned addresses via LANmonitor. This also lists the name of the connected remote site, the current IP address, and the addresses of DNS and NBNS servers. Options such as channel bundling or the duration of the connection are also displayed.
