To locate the ZEN IP addresses for your IPSec VPN tunnels:
You can find the name of your cloud in the URL your admins use to log into the Zscaler service. For example, if an organization logs into admin.zscalertwo.net, then that organization's cloud name is zscalertwo. Therefore, in this instance, you would go to ips.zscalertwo.net. To learn more, see What is my cloud name?
For example, if you're located in London, you can scroll to the Europe section of the table, then choose lon3-vpn.zscalertwo.net (London) as your primary destination and amsterdam2-vpn.zscalertwo.net (Amsterdam) as your secondary destination.