All secure traffic for Blackbaud Hosting Services requires port 443, governing HTTPS traffic, to be open.

All of our datacenters use a process that determines the most expedient path over the internet called Akamai, which requires that an exception be made for the hostname rather than a specific IP Address. Below is a list of the respected datacenter URL's which will need to be made as an exception to the firewall and/or proxy: 

Boston: https://login2.blackbaudhosting.com and https://ctx-login2.blackbaudhosting.com

Orange County: https://login1.blackbaudhosting.com

Vancouver: https://appsca.blackbaudonemand.com

Sydney: https://login4.blackbaudhosting.com

EU: https://login01.blackbaud.net/

If your organization requires a static IP Address, below are URLs for the Boston, Vancouver and Orange County Data Centers that do resolve to a single IP Address.

Boston:  https://testlogin2.blackbaudhosting.com
205.139.106.198

Orange County:  https://login1a.blackbaudhosting.com
209.67.139.4

Vancouver:  https://login3a.blackbaudhosting.com
204.92.98.251

Sydney: https://login4.blackbaudhosting.com
61.14.117.97

EU: https://login01.blackbaud.net/
212.46.135.243