RSBilling
Please don't test your biller setup with RSBilling's test account—it won't work correctly.
Set up on RSbilling's Website
River Styx Internet provides the RSBilling service. Start by registering on River Styx Internet's website.
Please make sure that your server is allowed to access the domain secure.sentrypayments.com by River Styx Internet so that your NATS installation will get the most up to date IP address list
Set up RSBilling in NATS
In the Billers Admin, enter your RSBilling Merchant ID, Merchant Password, and Remote Server ID. RSBilling will give all of these to you.
In the Sites admin, Under Biller Info, enter your Site ID. You can find your Site ID on the RSBilling administration Edit Sites webpage.
Under Join Options, enter your Product ID. RSBilling creates a Product ID for each site and billing option. You can find Product I.Ds. on RSBilling's website in the Edit Products screen.
Using RSBilling as a HTTPS Gateway
Please see the the HTTPS Gateways article.