Chargent Support Center


System.CalloutException: IO Exception: Unexpected end of file from server

The error "System.CalloutException: IO Exception: Unexpected end of file from server" is encountered by Salesforce in one of two cases:

1) The payment gateway has not whitelisted Salesforce's IP addresses, and is rejecting the call
2) The payment gateway is blocking or not responding to the call for another reason (firewall configuration, wrong endpoint, etc.)


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