The position and the direction on the interface where ASPF and packet filtering are employed concurrently should be focused on. Usually, we configure the deny any packet filtering for the inbound…

The position and the direction on the interface where ASPF and packet filtering are employed concurrently should be focused on. Usually, we configure the deny any packet filtering for the inbound packets and enable ASPF in the outbound direction. The relevant ports shall be opened in the packet filtering firewall when the internal server offers service to external.