Server Certificates

For secure SSL communication, gateways must establish trust with endpoint computers by showing a Server Certificate. This section discusses the procedures necessary to generate and install server certificates.

Check Point gateways, by default, use a certificate created by the Internal Certificate Authority on the Security Management Server as their server certificate. Browsers do not trust this certificate. When an endpoint computer tries to connect to the gateway with the default certificate, certificate warning messages open in the browser. To prevent these warnings, the administrator must install a server certificate signed by a trusted certificate authority.

All portals on the same Security Gateway IP address use the same certificate.

Obtaining and Installing a Trusted Server Certificate

To be accepted by an endpoint computer without a warning, gateways must have a server certificate signed by a known certificate authority (such as Entrust, VeriSign or Thawte). This certificate can be issued directly to the gateway, or be a chained certificate that has a certification path to a trusted root certificate authority (CA).

The next sections describe how to get a certificate for a gateway that is signed by a known Certificate Authority (CA).

Generating the Certificate Signing Request

First, generate a Certificate Signing Request (CSR). The CSR is for a server certificate, because the gateway acts as a server to the clients.

Note - This procedure creates private key files. If private key files with the same names already exist on the computer, they are overwritten without warning.

1. From the gateway command line, log in to expert mode.
2. Run:

   cpopenssl req -new -out <CSR file> -keyout <private key file> -config $CPDIR/conf/openssl.cnf

   This command generates a private key. You see this output:

   Generating a 2048 bit RSA private key
.+++
...+++
writing new private key to 'server1.key'
Enter PEM pass phrase:

3. Enter a password and confirm.

   Fill in the data.

   • The Common Name field is mandatory. This field must have the Fully Qualified Domain Name (FQDN). This is the site that users access. For example: portal.example.com.
   • All other fields are optional.
4. Send the CSR file to a trusted certificate authority. Make sure to request a Signed Certificate in PEM format. Keep the .key private key file.

Generating the P12 File

After you get the Signed Certificate for the gateway from the CA, generate a P12 file that has the Signed Certificate and the private key.

1. Get the Signed Certificate for the gateway from the CA.

   If the signed certificate is in P12 or P7B format, convert these files to a PEM (Base64 encoded) formatted file with a CRT extension.

2. Make sure that the CRT file has the full certificate chain up to a trusted root CA.

   Usually you get the certificate chain from the signing CA. Sometimes it split into separate files. If the signed certificate and the trust chain are in separate files, use a text editor to combine them into one file. Make sure the server certificate is at the top of the CRT file.

3. From the gateway command line, log in to expert mode.
4. Use the *.crt file to install the certificate with the *.key file that you generated.
   1. Run:

      cpopenssl pkcs12 -export -out <output file> -in <signed cert chain file> -inkey <private key file>

      For example:
      cpopenssl pkcs12 -export -out server1.p12 -in server1.crt -inkey server1.key

   2. Enter the certificate password when prompted.

Installing the Signed Certificate

To install the certificate:

1. Log in to SmartConsole.
2. From the left Navigation Toolbar, click Gateways & Servers.
3. Open the Identity Awareness Gateway object.
4. In the navigation tree, click the appropriate Software Blade page:
   • Mobile Access > Portal Settings
   • Platform Portal
   • Data Loss Prevention
   • Identity Awareness > Captive Portal > Settings > Access Settings

   In the Certificate section, click Import or Replace.

5. Install the Access Policy on the gateway.

   Note - The Repository of Certificates on the IPsec VPN page of the gateway object is only for self-signed certificates. It does not affect the certificate installed manually using this procedure.

Viewing the Certificate

To see the new certificate from SmartConsole:

1. In SmartConsole, click Gateways & Servers and double-click the Security Gateway.

   The gateway window opens and shows the General Properties page.

2. From the navigation tree, click Data Loss Prevention.
3. In the Certificate section, click View.