321
Configuring portal Web server detection
About portal Web server detection
A portal authentication process cannot complete if the communication between the access device
and the portal Web server is broken. To address this problem, you can enable portal Web server
detection on the access device.
With the portal Web server detection feature, the access device simulates a Web access process to
initiate a TCP connection to the portal Web server. If the TCP connection can be established
successfully, the access device considers the detection successful, and the portal Web server is
reachable. Otherwise, it considers the detection to have failed. Portal authentication status on
interfaces of the access device does not affect the portal Web server detection feature.
The portal Web server detection feature takes effect only when the URL of the portal Web server is
specified and the device has a portal-enabled interface.
You can configure the following detection parameters:
•
Detection
interval
—Interval at which the device detects the server reachability.
•
Maximum number of consecutive failures
—If the number of consecutive detection failures
reaches this value, the access device considers that the portal Web server is unreachable.
You can configure the device to take one or more of the following actions when the server
reachability status changes:
•
Sending a trap message to the NMS. The trap message contains the name and current state of
the portal Web server.
•
Sending a log message, which contains the name, the current state, and the original state of the
portal Web server.
•
Enabling portal fail-permit. When the portal Web server is unreachable, the portal fail-permit
feature on an interface allows users on the interface to have network access. When the server
recovers, it resumes portal authentication on the interface. For more information, see
"
Configuring the portal fail-permit feature
."
Procedure
To configure portal Web server detection:
Step Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter portal Web server
view.
portal web-server
server-name
N/A
3.
Configure portal Web server
detection.
server-detect
[
interval
interval
]
[
retry
retries
] {
log
|
trap
} *
By default, portal Web server
detection is disabled.
This feature takes effect
regardless of whether portal
authentication is enabled on an
interface or not.
Configuring portal user synchronization
About portal user synchronization
Once the access device loses communication with a portal authentication server, the portal user
information on the access device and that on the portal authentication server might be inconsistent
after the communication resumes. To address this problem, the device provides the portal user