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

If your organization can apply a Hostname exception: All of our datacenters use a process that determines the most expedient path over the internet called Akamai, which uses a dynamic list of IP addresses. This service 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: 
If your organization requires a static IP Address or is located in the Blackbaud SKY environment: The following URLs resolve to a single IP Address and should be added as exceptions to your firewall and/or proxy: 

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
61.14.102.77

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

Blackbaud SKY US: nxt.blackbaud.com
52.179.157.61

Blackbaud SKY Canada: nxt.blackbaud.com
52.233.47.7

Blackbaud SKY EU: nxt.blackbaud.com
52.174.28.161