When you enable DHCP server on the NIC that you’re trying to ping from, you get Invalid argument
If you have enabled DHCP server, the Static ARP option might be enabled by default. To fix the communication issue between clients and the firewall simply disable this option by un ticking the option “Enable static ARP entries”.

If you have enabled DHCP server, the Static ARP option might be enabled by default. To fix the communication issue between clients and the firewall simply disable this option by un ticking the option “Enable static ARP entries”.
