147
•
Cross-subnet authentication mode (
layer3
) does not require Layer 3 forwarding devices
between the access device and the portal authentication clients. However, if a Layer 3
forwarding device exists between the authentication client and the access device, you must use
the cross-subnet portal authentication mode.
•
With re-DHCP portal authentication, configure authorized ARP on the interface as a best
practice to make sure only valid users can access the network. With authorized ARP configured
on the interface, the interface learns ARP entries only from the users who have obtained a
public address from DHCP.
•
For successful re-DHCP portal authentication, make sure the BAS-IP/BAS-IPv6 attribute value
is the same as the device IP or IPv6 address specified on the portal authentication server. To
configure the BAS-IP/BAS-IPv6 attribute, use the
portal
{
bas-ip
|
bas-ipv6
} command.
•
An IPv6 portal server does not support re-DHCP portal authentication.
•
You can enable both IPv4 portal authentication and IPv6 portal authentication on an interface.
Configuration procedure
To enable portal authentication:
Step Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter interface view.
interface
interface-type
interface-number
The interface must be a
Layer 3 interface.
3.
Enable portal authentication.
•
To enable IPv4 portal
authentication:
portal enable method
{
direct
|
layer3
|
redhcp
}
•
To enable IPv6 portal
authentication:
portal ipv6
enable method
{
direct
|
layer3
}
Enable IPv4 portal
authentication, IPv6 portal
authentication, or both on the
interface.
By default, portal
authentication is disabled.
Specifying a portal Web server
With a portal Web server specified on an interface, the device redirects the HTTP requests of portal
users on the interface to the portal Web server.
You can specify both an IPv4 portal Web server and an IPv6 portal Web server on an interface.
To specify a portal Web server on an interface:
Step Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter interface view.
interface
interface-type
interface-number
The interface must be a Layer
3 interface.
3.
Specify a portal Web
server.
•
To specify an IPv4 portal Web server:
portal apply web-server server-name
[
fail-permit
]
•
To specify an IPv6 portal Web server:
portal ipv6 apply web-server
server-name
[
fail-permit
]
Specify an IPv4 portal Web
server, an IPv6 portal Web
server, or both.
By default, no portal Web
servers are specified.
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