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access device uses the source port in the logout request as the destination port in the logout ACK
message. As a result, the portal authentication server can definitely receive the logout ACK message
and log out the user.
Solution
1. Use the display portal server command to display the listening port of the portal
authentication server configured on the access device.
2. Use the portal server command in system view to change the listening port number to the
actual listening port of the portal authentication server.
Cannot log out portal users on the RADIUS server
Symptom
The access device uses the HPE IMC server as the RADIUS server to perform identity
authentication for portal users. You cannot log out the portal users on the RADIUS server.
Analysis
The HPE IMC server uses session control packets to send disconnection requests to the access
device. On the access device, the listening UDP port for session control packets is disabled by
default. Therefore, the access device cannot receive the portal user logout requests from the
RADIUS server.
Solution
On the access device, execute the radius session-control enable command in system view to
enable the RADIUS session control function.
Users logged out by the access device still exist on the portal
authentication server
Symptom
After you log out a portal user on the access device, the user still exists on the portal authentication
server.
Analysis
When you execute the portal delete-user command on the access device to log out a user, the
access device sends an unsolicited logout notification to the portal authentication server. If the
BAS-IP or BAS-IPv6 address carried in the logout notification is different from the portal device IP
address specified on the portal authentication server, the portal authentication server discards the
logout notification. When sending of the logout notifications times out, the access device logs out the
user. However, the portal authentication server does not receive the logout notification successfully,
and therefore it regards the user is still online.
Solution
Configure the BAS-IP or BAS-IPv6 attribute on the interface enabled with portal authentication.
Make sure the attribute value is the same as the portal device IP address specified on the portal
authentication server.
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