How do you configure the management port to access internet? I have set with default gateway but do I need to had a route to 0.0.0.0 ? I only have the mgmt port connected at this time.
the management interface does not have direct access to the internet. it will need to route via it's default gateway.
if the default gateway does not have a route to the internet then no chance....
if your palo alto is the gateway to the internet then you will need to add a route on the default gateway to point it back to the trusted interface on the PA. from your post it seems this has not been done yet.
MickBall pretty much covered it.
Also note that when your internet access goes through the FW, you will need to add security rules to allow the traffic.
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