F3726, F3211, F3174, R5135, R3816-HP Firewalls and UTM Devices Access Control Configuration Guide-6PW100

168
2. Probe parameters
{ Probe interval—Interval at which probe attempts are made.
{ Maximum number of probe attempts—Maximum number of consecutive probe attempts
allowed. If the number of consecutive probes reaches this value, the access device considers
that the portal server is unreachable.
3. Actions to be taken when the server reachability status changes (you can choose one or more)
{ Sending a trap message—When the status of a portal server changes, the access device sends
a trap message to the NMS. The trap message contains the portal server name and the current
state of the portal server.
{ Sending a log—When the status of a portal server changes, the access device sends a log
message. The log message indicates the portal server name and the current state and original
state of the portal server.
{ Disabling portal authentication (enabling portal authentication bypass)—When the device
detects that a portal server is unreachable, it disables portal authentication on the interfaces
that use the portal server (allows all portal users on the interfaces to access network resources).
When the device receives from the portal server portal heartbeat packets or authentication
packets (such as logon requests and logout requests), it re-enables the portal authentication
function.
You can configure any combination of the configuration items described as needed, with respect to the
following:
• If both detection methods are specified, a portal server is regarded as unreachable as long as one
detection method fails, and an unreachable portal server is regarded as recovered only when both
detection methods succeed.
• If multiple actions are specified, the access device executes all the specified actions when the status
of a portal server changes.
• The detection function configured for a portal server takes effect on an interface only after you
enable portal authentication and reference the portal server on the interface.
To configure the portal server detection function:
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Configure the portal
server detection
function.
portal server server-name server-detect
method { http | portal-heartbeat } * action
{ log | permit-all | trap } * [ interval
interval ] [ retry retries ]
Not configured by default.
The portal server specified in the
command must exist.
The portal heartbeat detection method works only when the portal server supports the portal server
heartbeat function. Only the IMC portal server supports the portal server heartbeat function. To
implement detection with this method, you also need to configure the portal server heartbeat function on
the IMC portal server and make sure that the product of interval and retry is greater than or equal to the
portal server heartbeat interval. HP recommends configuring the interval to be greater than the portal
server heartbeat interval configured on the portal server.
213BConfiguring portal user information synchronization
Once the device loses communication with a portal server, the portal user information on the device and
that on the portal server may be inconsistent after the communication resumes. To solve this problem, the