How do I edit a firewall policy in SEPM 12.1.5 to block all outbound traffic?
When creating the rule, configure the remote port to include the ports you want to block.
But I want to block all outbound traffic. I don't have specific ports, just all outbound traffic. Isn't there a way to create a rule that blocks all outbound traffic, and allow incoming traffic?
Not exactly.
By default, the SEP firewall will block any traffic for which a rule does not exist. So if there is something specific going outbound, you can setup a rule(s) to block.
There isn't an option to 'block all outbound traffic'