In addition to the GRE or IPSec VPN tunnel, Zscaler recommends that you install a PAC file for each user to ensure coverage outside the corporate network. To learn more about how to use PAC files to forward traffic to the Zscaler service, see Using Default PAC Files to Forward Traffic to...
If your organization needs to use custom PAC files, Zscaler highly recommends that you copy and paste the default PAC file in the ZIA Admin Portal and edit the file accordingly. This article provides best practices for writing a PAC file: Use a simple text editor, such as Windows Notepad, ...