Updating paypal ip addresses

[tahiti amin]

I received this email from paypal:
"Earlier this year, we sent several communications alerting you that we were moving our primary data center to Salt Lake City. That change occurred successfully on April 19. Our data center in Phoenix is now used as a backup site.

According to our records, your API transactions are still routing through our Phoenix data center.

In our previous communications, we included reminders that if you did not point to our DNS and have hard-coded PayPal’s IP addresses into the routing of your API calls and/or firewall settings, you would need to reconfigure these settings after the upgrade.

To ensure that you continue to receive PayPal services, it is important that you make the necessary changes to your routing and/or firewall settings to ensure that you are not hard-coded to our back up site. Notifications regarding maintenances, downtimes or upgrades will only apply to our primary data center and no notification will be given for these types of events on the back up site"

They then went on to give a list of the new IP addresses I needed to apply. I have contacted paypal to find out how to take these actions but they have failed to get back to me. Can anyone give me step by step directions on how to make these changes?
THanks
Rich

[tahiti amin]

no one knows how to do this?

[DrByte]

Those are issues you need to take up with your hosting company.

Zen Cart doesn't target specific IP addresses when talking to PayPal. It correctly uses the DNS names, as per PayPal's requirements.
So, if your transactions are hitting the wrong servers, then that means your website's servers are using DNS lookups that are cached with old information. Your hosting company will have to fix this, since they are the server administrators and the firewall administrators. These are basic skills for the senior technical staff at the hosting company.

If they can't or won't fix it, then find a hosting company who knows what they're doing.