I would strongly recommend securing your site since card numbers being entered on your site will be in the clear unless your site is using an SSL certificate and customers are using https:// in their browsers.
When you're ready to set up the referrer setting, this might be useful info:
Q: I get the following error when I try to check out:
"4003 - HTTP Referrer Invalid"
A: You must set up a valid referrer in your VM Web Terminal Configuration.
You should set your Web Terminal up with a simple
https://mysite.com URL.
Go to the Terminal -> Advanced -> System Setup menu options:
- MUST Enable HTTP Transactions: (check box)
- DO set up the HTTP Referrer security option in your Elavon VM configuration.
(Add your site as a Referrer to the list of authorized referrers!)
Add ONLY your SSL-based website domain name in the VM Terminal settings.
Do not include any cart path or subfolder information in this setting.
Referrer Example:
https://www.yoursite.com
Hope this helps!
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