A host attached to Ethernet 1/4 cannot ping the default gateway. The widget on the dashboard shows Ethernet 1/1 and Ethernet 1/4 to be green. The IP address of Ethernet 1/1 is 192.168.1.7 and the IP…

On a Palo Alto Networks firewall, all interfaces participating in traffic forwarding must be assigned to a security zone. If Ethernet 1/4 lacks a configured zone, the firewall will drop traffic originating from it, preventing the host from reaching its default gateway on Ethernet 1/1.

If Ethernet 1/1 were in Virtual Wire Mode, it would not have an IP address configured to act as a default gateway as described in the problem.

DNS configuration issues on the firewall affect name resolution, not the ability of a host to ping a direct IP address.

DNS configuration on the host affects name resolution for the host, but does not prevent it from pinging an IP address directly.