Configuring re-DHCP portal authentication
Network requirements
As shown in Figure 67, the host is directly connected to the router (the access device). The host obtains an IP address through the DHCP server. A portal server acts as both a portal authentication server and a portal Web server. A RADIUS server acts as the authentication/accounting server.
Configure re-DHCP portal authentication. Before passing the authentication, the host is assigned a private IP address. After passing the authentication, the host gets a public IP address and can access network resources.
Figure 60: Network diagram
Configuration prerequisites and guidelines
Configure IP addresses for the router and servers as shown in Figure 67 and make sure the host, router, and servers can reach each other.
Configure the RADIUS server correctly to provide authentication and accounting functions.
For re-DHCP portal authentication, configure a public address pool (20.20.20.0/24) and a private address pool (10.0.0.0/24) on the DHCP server. (Details not shown.)
For re-DHCP portal authentication:
The router must be configured as a DHCP relay agent.
The portal-enabled interface must be configured with a primary IP address (a public IP address) and a secondary IP address (a private IP address).
For information about DHCP relay agent configuration, see Layer 3—IP Services Configuration Guide.
Make sure the IP address of the portal device added on the portal server is the public IP address (20.20.20.1) of the router's interface connecting the host. The private IP address range for the IP address group associated with the portal device is the private subnet 10.0.0.0/24 where the host resides. The public IP address range for the IP address group is the public subnet 20.20.20.0/24.
Configuration procedure
Perform the following tasks on the router.
Configure a RADIUS scheme:
# Create a RADIUS scheme named rs1 and enter its view.
<Router> system-view [Router] radius scheme rs1
# Specify the primary authentication server and primary accounting server, and configure the keys for communication with the servers.
[Router-radius-rs1] primary authentication 192.168.0.113 [Router-radius-rs1] primary accounting 192.168.0.113 [Router-radius-rs1] key authentication simple radius [Router-radius-rs1] key accounting simple radius
# Exclude the ISP domain name from the username sent to the RADIUS server.
[Router-radius-rs1] user-name-format without-domain [Router-radius-rs1] quit
# Enable RADIUS session control.
[Router] radius session-control enable
Configure an authentication domain:
# Create an ISP domain named dm1 and enter its view.
[Router] domain dm1
# Configure AAA methods for the ISP domain.
[Router-isp-dm1] authentication portal radius-scheme rs1 [Router-isp-dm1] authorization portal radius-scheme rs1 [Router-isp-dm1] accounting portal radius-scheme rs1 [Router-isp-dm1] quit
# Configure domain dm1 as the default ISP domain. If a user enters the username without the ISP domain name at login, the authentication and accounting methods of the default domain are used for the user.
[Router] domain default enable dm1
Configure DHCP relay and authorized ARP:
# Configure DHCP relay.
[Router] dhcp enable [Router] dhcp relay client-information record [Router] interface gigabitethernet 1/0/2 [Router–GigabitEthernet1/0/2] ip address 20.20.20.1 255.255.255.0 [Router–GigabitEthernet1/0/2] ip address 10.0.0.1 255.255.255.0 sub [Router-GigabitEthernet1/0/2] dhcp select relay [Router-GigabitEthernet1/0/2] dhcp relay server-address 192.168.0.112
# Enable authorized ARP.
[Router-GigabitEthernet1/0/2] arp authorized enable [Router-GigabitEthernet1/0/2] quit
Configure portal authentication:
# Configure a portal authentication server.
[Router] portal server newpt [Router-portal-server-newpt] ip 192.168.0.111 key simple portal [Router-portal-server-newpt] port 50100 [Router-portal-server-newpt] quit
# Configure a portal Web server.
[Router] portal web-server newpt [Router-portal-websvr-newpt] url http://192.168.0.111:8080/portal [Router-portal-websvr-newpt] quit
# Enable re-DHCP portal authentication on GigabitEthernet 1/0/2.
[Router] interface gigabitethernet 1/0/2 [Router-GigabitEthernet1/0/2] portal enable method redhcp
# Reference the portal Web server newpt on GigabitEthernet 1/0/2.
[Router–GigabitEthernet1/0/2] portal apply web-server newpt
# Configure the BAS-IP as 20.20.20.1 for portal packets sent from GigabitEthernet 1/0/2 to the portal authentication server.
[Router–GigabitEthernet1/0/2] portal bas-ip 20.20.20.1 [Router–GigabitEthernet1/0/2] quit
Verifying the configuration
# Verify that the portal configuration has taken effect.
[Router] display portal interface gigabitethernet 1/0/2
Portal information of GigabitEthernet1/0/2
NAS-ID profile: Not configured
VSRP instance : Not configured
VSRP state : N/A
Authorization : Strict checking
ACL : Disabled
User profile : Disabled
IPv4:
Portal status: Enabled
Authentication type: Redhcp
Portal Web server: newpt(active)
Authentication domain: Not configured
Pre-auth domain: Not configured
User-dhcp-only: Disabled
Pre-auth IP pool: Not configured
Max portal users: Not configured
Bas-ip: 20.20.20.1
User detection: Not configured
Action for server detection:
Server type Server name Action
-- -- --
Layer3 source network:
IP address Mask
Destination authenticate subnet:
IP address Mask
IPv6:
Portal status: Disabled
Authentication type: Disabled
Portal Web server: Not configured
Authentication domain: Not configured
Pre-auth domain: Not configured
User-dhcp-only: Disabled
Pre-auth IP pool: Not configured
Max portal users: Not configured
Bas-ipv6: Not configured
User detection: Not configured
Action for server detection:
Server type Server name Action
-- -- --
Layer3 source network:
IP address Prefix length
Destination authenticate subnet:
IP address Prefix length
Before passing the authentication, a user that uses the HPE iNode client can access only the authentication page http://192.168.0.111:8080/portal. All Web requests from the user will be redirected to the authentication page. After passing the authentication, the user can access other network resources.
# After the user passes authentication, use the following command to display information about the portal user.
[Router] display portal user interface gigabitethernet 1/0/2
Total portal users: 1
Username: abc
Portal server: newpt
State: Online
VPN instance: N/A
MAC IP VLAN Interface
0015-e9a6-7cfe 20.20.20.2 -- GigabitEthernet1/0/2
Authorization information:
DHCP IP pool: N/A
User profile: N/A
ACL: N/A
CAR: N/A