Hi,
Do you have open below ports for push deployment ?
Ports used for client software deployment with the Push Deployment Wizard
Client computers
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Symantec Endpoint Protection Manager
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TCP 139 and 445
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Ephemeral TCP ports
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Ephemeral TCP ports
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TCP 139 and 445
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UDP 137, 138
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UDP 137, 138
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Prepare computers for remote deployment and management
Modify firewall settings to allow communication between Symantec Endpoint Protection Small Business Edition components:
■ Push deployment ports, used on management servers and clients: TCP 139 and 445, UDP 137 and 138, and TCP ephemeral ports.
■ For legacy communications, open UDP port 2967 on all computers.
■ General communication: TCP 8014 (HTTP)/TCP 443 (HTTPS) for management servers. These are the default ports, and may be customized. See Symantec Endpoint Protection 12.1: How to Change the ports used for communication between the Manager and clients.
Reference
http://www.symantec.com/business/support/index?page=content&id=TECH163112