This article uses an ASA 5510 that runs software version 8.0(2) and ASDM version 6.0(2) and provides instructions for generating a Certificate Signing Request (CSR) for Cisco ASA 5510.

Note: To generate a CSR, you will need to create a key pair for your server. These two items are a digital certificate key pair and cannot be separated. If you lose your public/private key file or your password and generate a new one, your SSL Certificate will no longer match.

To generate a certificate signing request (CSR) for Cisco ASA 5510, perform the following steps:

Step 1: Generate a key pair

1. Within ASDM, click Configuration > Device Management
2. Click Certificate Management > Identity Certificates > Add > Add a new identity certificate
3. For the Key Pair, click New > Enter new key pair name
4. Enter a unique key pair name for the certificate
5. Select the key size as 2048
6. To complete the generation of the key pair, click Generate Now
   

Step 2: Generate a certificate signing request (CSR) file

1. To enter certificate information, click Select
2. From the drop-down list, select the following attributes > enter value > click Add
   

   Country Name (C): Use the two-letter code without punctuation for country, for example: US or GB.

   State or Province (S): Spell out the state completely; do not abbreviate the state or province name, for example: New Jersey.

   Locality or City (L): The Locality field is the city or town name, for example: Clifton.

   Organization (O): If your company or department has an &, @, or any other symbol using the shift key in its name, you must spell out the symbol or omit it to enroll, for example: AB & C Corporation would be ABC Corporation or AB and C Corporation.

   Organizational Unit (OU): This field is the name of the department or organization unit making the request.

   Common Name (CN): The Common Name is the Host + Domain Name. It looks like 'www.example.com' or 'example.com'.

3. Once the appropriate values are added, click OK > Advanced
4. In the FQDN field, enter the FQDN that will be used to access the device from the Internet:
   
   Note 1: If enrolling for a Subject Alternative Name certificate leave this field blank.
   Note 2: This value should be same FQDN you used for the Common Name (CN) or Domain Name.
   
5. Click OK > Add Certificate > Browse
6. Choose a location where to save the request file
7. Verify the CSR using our CSR Decoder
8. Upload the CSR to your order via your Sectigo account.

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