You could disable general DHCP and just create static entries for the MACs you want to allow. But the question doesn't make sense in the context of a Sonicwall TZ270, it's not a switch and you're not… (View Post)

That linked article says it's not supported on TZ series so don't know how you think you're going to get it working. TZ series does support Portshield though, have you tried that? (View Post)

Do a packet capture, do you see packets leaving the interface with a source IP of .9? If yes: It's a config issue on your firewall. If no: Whatever is upstream of you is NATing your traffic to .9 (View Post)

In a packet capture, you are looking for what is being dropped by the firewall. Look at source/dest ip/port combination, amend firewall rules to match. Dropped packets are highlighted in red. I need … (View Post)

Create a NAT policy that matches the above conditions and make sure it's ABOVE the default NAT rule otherwise it won't take effect. Observe the hit counter on it when you're testing. (View Post)