Symantec Endpoint Protection (SEP) and ProxySG device(s) are in the same environment.
Integrate the use of SEP and ProxySG.
Symantec announced that SEP can be integrated with ProxySG. To integrate SEP with ProxySG, a Content Analysis System (CAS) running 2.1 or later
or Advanced Secure Gateway (ASG) running 220.127.116.11 is required. The ProxySG and\or ASG must be configured to send client IP via ICAP to CAS. The CAS must
be configured with Sandboxing and SEP services.
Please see this documentation for details: