HP VSR1000 Security Configuration Manual page 121

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 regards 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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