Protected traffic is tunneled through the Symantec Web Security Service (WSS).
The egress IP address viewed by web servers is no longer the egress IP address of my own network.
What IP addresses does our traffic come from?
The egress and ingress IP addresses are now consolidated into a single article. Please see https://knowledge.broadcom.com/external/article/167174/web-security-service-wss-ingress-and-egr.html for the list of all the ingress and egress IP addresses.