Knowledge Base

Version

Cb Response 5.x

Topic

How to remove the check for duplicates caused by multiple DNS Names for a single sensor.

Steps

1. Check if computer_dns_name is the same across duplicates. This setting isn’t currently displayed in the UI and needs to be queried via SSH:
   

   psql -d cb -p 5002 -c "SELECT id,computer_name,computer_dns_name,last_checkin_time,registration_time FROM sensor_registrations ORDER BY computer_name;"

2. If this is the case, the default_new_sensor_registration_callback.py can be
   

   cp /usr/share/cb/plugins/default_new_sensor_registration_callback.py /usr/share/cb/plugins/custom_new_sensor_registration_callback.py

3. Modify custom_new_sensor_registration_callback.py to only check on the computer hostname rather than hostname and dns name by commenting out this line:
   

   #.filter(SensorRegistration.computer_dns_name == sensor_dns_name) \

   Note: Make sure tabbing in the file remains the same.

4. Once changes are made, verify the script compiles with this command and fix any errors:
   

   python /usr/share/cb/plugins/custom_new_sensor_registration_callback.py

5. Make changes in /etc/cb/cb.conf to import the new script
   From:
   

   NewRegistrationCallbackModulePath=/usr/share/cb/plugins/default_new_sensor_registration_callback.py

   To:
   

   NewRegistrationCallbackModulePath=/usr/share/cb/plugins/custom_new_sensor_registration_callback.py

6. Restart the server
   1. For single server environments:
      

      service cb-enterprise restart

   2. For clusters:
      

      /usr/share/cb/cbcluster stop /usr/share/cb/cbcluster start