The following prerequisites apply to both, appliance and VM upgrades:
Symantec strongly recommends that you back up your ATP data before you upgrade. See the Symantec™ Advanced Threat Protection Administration Guide for information about backing up your ATP data.
You must upgrade the ATP software to version 3.x before you perform hardware platform upgrades. Virtual installations install the software after upgrades to the VM resource allocations are made.
Make sure that ports 443 and 8080 are open to traffic.
IMPORTANT: Endpoint Data Recorder is not enabled by default. Perform the upgrade before enabling Endpoint Data Recorder. Also, make sure that your network infrastructure is able to handle the increased traffic that the Endpoint Data Recorder incurs. See the Symantec™ Advanced Threat Protection Installation Guide for requirements and recommended network configurations.
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