In a attempt to keep ports not used closed using apf firewall, i made some adjustments and notice plesk update now fails. according to the list above autoinstaller uses port 8447 TCP, does this port needs to be open for both in and outbound. Error log was clear that the failure was due to connection issue.
Details: File downloading products.inf3: Error: couldn't connect to host, retry...
Error: couldn't connect to host, retry...
Error: couldn't connect to host, retry...
File downloading versions.inf3: Error: couldn't connect to host, retry...
Error: couldn't connect to host, retry...
Error: couldn't connect to host, retry...
ERROR: Failed to read product information from the file : Can't process products.inf3: Failed to download the package
http://autoinstall.plesk.com/products.inf3:
couldn't connect to host
Can't process versions.inf3: Failed to download the package
http://autoinstall.plesk.com/versions.inf3:
couldn't connect to host