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# Removing SNS firewalls from the SMC server

To perform this operation, you need to hold write access privileges on the folders containing the firewalls to be removed. For more information, refer to the section Restricting folder administrators' access privileges.

To stop managing a firewall from the SMC server, and to remove it from the list of firewalls in the web interface:

- Scroll over the name of the firewall in Monitoring > Firewalls and click on the red cross.
  When the firewall is deleted in SMC, the operation will automatically delete the configuration that connects the firewall to SMC, as long as the firewall is connected to SMC when the configuration is deleted. The files *.tpm and *.pem will be deleted from the folder /usr/Firewalls/ConfigFiles/Cad on the firewall. As a result, the firewall will no longer be able to connect to the SMC server.

Manually deleting the SMC connection configuration on the firewall

When necessary, the procedure below can be used to manually delete the configuration on the firewall allowing the connection to SMC:

1. Connect to the firewall in SSH or via your hypervisor console,

2. Enter the following command lines:
   `nstop cad
   setconf /usr/Firewall/ConfigFiles/Cad/cad Server State 0
   rm /usr/Firewall/ConfigFiles/Cad/*.pem
   rm /usr/Firewall/ConfigFiles/Cad/*.tpm
   rm /usr/Firewall/ConfigFiles/nsconf_int
   encad`

In the case of a high availability cluster, enter these commands on the active node of the cluster and synchronize both nodes.