If a previously installed certificate has the same ID as a new certificate, conflicts may occur. In this case the previous certificate must be deleted. VPN connections can be deleted from the Lancom router on the configuration interface when no longer required. Certificates cannot be deleted using the normal interface.

One possibility is to save the configuration, reset the router completely and then restore the configuration. In this case, however, all certificates are deleted.

The other way is by using the command line via Telnet or SSH. Go to the certificate directory with cd /Status/File-System/Contents. Display the contents of the directory with the ls command. Various certificates are displayed, such as vpn_rootcert, vpn_add_cas and vpn_pkcs12. You can use the del vpn_add_cas command for example, to delete the certificate of the peer.