184
Re-DHCP portal authenticated users cannot log in
successfully
Symptom
The device performs re-DHCP portal authentication for users. A user enters the correct username
and password, and the client successfully obtains the private and public IP addresses. However, the
authentication result for the user is failure.
Analysis
When the access device detects that the client IP address is changed, it sends an unsolicited portal
packet to notify of the IP change to the portal authentication server. The portal authentication server
notifies of the authentication success only after it receives the IP change notification from both the
access device and the client.
If the BAS-IP or BAS-IPv6 address carried in the portal notification packet is different from the portal
device IP address specified on the portal authentication server, the portal authentication server
discards the portal notification packet. As a result, the portal authentication server considers that the
user has failed the authentication.
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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