How to handle the problem that no host status information is displayed on the Nagios home page?

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Procedure
Step 1 Change the value of use_authentication.
1. Open the cgi.cfg file in /usr/local/nagios/etc.
2. Find use_authentication.
3. Change the value of use_authentication to 0.
Step 2 Run the service nagios restart command to restart the Nagios server.
After the restart, host status information is correctly displayed on the Nagios home page,

Other related questions:
What is the possible causes that there is no host status information is displayed on the Nagios home page?
Possible Causes: The value of use_authentication in the /usr/local/nagios/etc/cgi.cfg configuration file is 1.

How can I handle the problem where the font displayed on the tablet UI is abnormal?
When the font on the tablet is configured to large or ultra large, the font displayed on the tablet UI is abnormal. To handle the problem, perform the following operations: 1. On the tablet UI, select Settings. 2. On the configuration page, select Display. On the page that is displayed on the right, select Font size. 3. Set the font size to mall, normal, large, Extra large, and Huge.

Problem and solution when the OSPF status is abnormal
To solve the problem that the OSPF status between the firewall and the peer device cannot reach the Full state, perform the following steps: 1. Check the OSPF status. Check whether the OSPF neighboring relationship can be established between the firewall and the peer device. 2. If no, check the security policy configuration. Check whether the security policy control function for unicast packets is enabled. That is, check whether the firewall packet-filter basic-protocol enable command is configured. If yes, run the undo firewall packet-filter basic-protocol enable command to disable the function. To establish an OSPF neighboring relationship, devices need to exchange DD packets. DD packets are OSPF unicast packets. By default, the forwarding of OSPF unicast packets is not controlled by security policies. However, if you run the firewall packet-filter basic-protocol enable command to enable the security policy control function for OSPF unicast packets, you need also to configure the corresponding security policy to allow the packets to be forwarded. For details, see OSPF can not step into full state caused by security policy deny.

The CDR pool of the U1980 is full. How to handle this problem?
1. Run the show billpool state command to check whether the CDR pool is full. 2. Run the show billserver state command to check whether the CDR server is in Fault state. 3. Run the config createbill switch off command to disable the CDR generation function. 4. In Debug mode, run the debug debug_pid bill_server cmd 45 p1 <0-4294967295> p2 <0-4294967295> command to delete CDRs. The p1 parameter indicates the start ID of CDRs to be deleted and p2 indicates the quantity of CDRs to be deleted. Example: debug debug_pid os_pid_bill_server cmd 45 p1 0 p2 479999

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