Table of Contents
Advertisement
3Com Router 3000 Ethernet Family
Configuration Guide
rather than enter the user name and password, to initiate fast authentication. In addition,
the attribute fields of the user name and password in the authentication request sent
from the portal server to the router are filled randomly, while the router fills the
configured user name and password in the authentication request it sends to the
RADIUS server. If the user name and the password match those on the RADIUS server,
the user is authenticated successfully.
3.1.4 Portal Operating Modes
On 3Com routers, the portal feature can be implemented in two methods (also called
operating modes): direct authentication, and re-DHCP authentication.
In direct authentication mode: Before passing the authentication, a user with a
public IP address can only access the portal server and the predefined free IP
addresses. After passing the authentication, the user can access the Internet.
In re-DHCP authentication mode: Before passing the authentication, a user with a
private IP address from the DHCP server can only access the portal server and
the predefined free IP addresses. After passing the authentication, the user can
obtain a public IP address to access the Internet.
Both fast portal authentication and normal portal authentication support these two
authentication methods.
3.1.5 Authentication-Free Users and Free IP Addresses
I. Authentication-free users
Authentication-free users can access the Internet without portal authentication. In
actual networking environments, you can configure some servers and the network
devices attached to the router as authentication-free users.
Authentication-free user information contains the IP address of the user and the
interface on the router to which the user is connected. Only the user whose information
fully matches the authentication-free user information can be allowed to access the
Internet without authentication.
II. Free IP addresses
Free IP addresses are the IP addresses which users can access without limitation. A
free IP address can be the IP address of a DNS server, or the IP address of a free
website provided by an Internet service provider (ISP).
3.2 Basic Portal Configuration
3.2.1 Configuration Prerequisites
Before performing portal configuration, make sure:
3Com Corporation
3-3
Chapter 3 Portal Configuration
Advertisement
Chapters
Table of Contents
Troubleshooting
