Why am I getting the error “4020 : Information received from an Invalid IP address.” from SagePay?
问题 This is a PHP (Zend Framework 1.11) site, not using an off-the-shelf package. When the request to: https://live.sagepay.com/gateway/service/vspserver-register.vsp (with a TxType of PAYMENT ), I get the following response: 4020 : Information received from an Invalid IP address. I have logged in to the SagePay admin area and added the IP address of the live server to the Valid IPs section and I've made sure it's using the correct SagePay URL to post to and. An important note is that this issue