Configure the Client Certificate for IPsec/IP Filtering. When you set it, you can use the certificate as an authentication method for IPsec/IP Filtering. If you want to configure the certification authority, go to CA Certificate.
Access Web Config and then select the Network Security tab > IPsec/IP Filtering > Client Certificate.
Import the certificate in Client Certificate.
If you have already imported a certificate published by a Certification Authority, you can copy the certificate and use it in IPsec/IP Filtering. To copy, select the certificate from Copy From, and then click Copy.