In the method for expanding an address for an Internet protocol in an Internet
edge router and the record medium capable of being read through a computer having
a record of a program to realize the inventive method, an address expanding system
of IPv4 used by incorporating public network connection information in an IPv4
address is utilized, thereby, all services of the existing IPv4 can be accepted
and an enlargement to a new service can be valid. That is, in such Internet edge
router, the inventive method comprises the steps of defining public network connection
information in an option class of an Internet protocol message; b) constructing
a security & authentication (SA) module and an SA hierarchical protocol in a service
terminal protocol in order to provide IP address information and a user authentication
from a server having information of the existing public network subscribers by
using the public network connection information, and constructing a connection
information processing part to process the public network connection information;
and c) receiving a message from a network interface and processing it, in the connection
information processing part, whereby being applied to an Internet service system.
