Developer's Guide

Installing and Configuring the Payflow SDK
Preparing the Payflow Client Application
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14 Website Payments Pro Developer’s Guide
Preparing the Payflow Client Application
Follow these steps to download and install:
Step 1 Download the Payflow SDK
From the Download page in PayPal Manager (
https://manager.paypal.com), download the
Payflow SDK appropriate for your platform.
Step 2 Extract the files to a local directory
Step 3 Configure your firewall
If you have a stateful firewall, enable outbound traffic for SSL (port 443). The firewall
keeps state on the connection, and automatically permits the inbound response from PayPal.
If you do not have a stateful firewall, enable inbound and outbound traffic for SSL (port 443).
Outbound traffic permits the initial request by Website Payments Pro, while inbound permits
the response from PayPal.
Step 4 Set the certificate path
To enable the client to authenticate the Payflow server, you must set the path to include
the certs directory (included with the SDK that you downloaded).
For specific information on setting the certificate path, see the readme.txt file and example
applications in the SDK.
Step 5 Read the readme.txt file
The readme.txt file includes integration information and samples that illustrate how to use
the client in your development environment.