As of my last knowledge update in September 2021, NordVPN is a popular VPN service that provides secure and private internet access. If you're interested in offering NordVPN services to your clients through WHMCS, you might consider becoming a NordVPN affiliate or reseller.

Here's a general outline of how you might go about it:

1. Apply for NordVPN Affiliate/Reseller Program:

   • Visit the NordVPN website and look for information about their affiliate or reseller program. Sign up and follow their application process.

2. Get Affiliate/Reseller Credentials:

   • Upon approval, you will likely receive unique affiliate or reseller credentials. These may include affiliate links or codes that track your referrals.

3. Set Up Product in WHMCS:

   • In your WHMCS admin panel, navigate to "Setup" > "Products/Services" and create a new product category for VPN services.

   • Add a new product for NordVPN, and set the pricing and billing details based on your agreement with NordVPN.

4. Configure Product Links or Codes:

   • Use the affiliate links or codes provided by NordVPN to link your WHMCS product to NordVPN's services. This ensures that any purchases made through your WHMCS portal are attributed to your affiliate account.

5. Set Pricing and Billing:

   • Determine the pricing structure for your NordVPN service within WHMCS. You'll need to set the initial price, recurring billing cycle, and any promotions or discounts you'd like to offer.

6. Market NordVPN Services:

   • Promote your NordVPN services to your clients through your WHMCS portal. This might include creating marketing materials, sending out newsletters, or running special promotions.

7. Handle Orders and Billing:

   • When clients place orders for NordVPN services through WHMCS, the system will handle the billing and registration process.

8. Track and Monitor Sales:

   • Regularly monitor your sales and referrals through the NordVPN affiliate or reseller dashboard.

Remember to check NordVPN's specific terms and conditions regarding affiliate or reseller partnerships, as these can vary from program to program. Also, keep in mind that there might be updates or changes in NordVPN's affiliate or reseller program after my last knowledge update in September 2021, so it's always a good idea to refer to NordVPN's official website or contact their support for the most current information.