Adding new interface - getting DHCP addess but no connectivity

[imabev]

I added a third interface to my LAN and WAN. LAN and WAN work fine. When I connect to the third interface (DMZ), I get a DHCP address but nothing else; cannot ping the DMZ interface address, cannot connect to gui, cannot get interface. Firewall for this interface is allow everything. What simple setting am I missing?

[Derelict]

Show us this "allow anything" rule.

[imabev]

Images of interface and firewall rule for DMZ

[Derelict]

Nothing to keep it from working. How did you set up DHCP?

[imabev]

DHCP - nothing special

[Derelict]

I guess show us the DHCP, etc the client gets.

[imabev]

Thanks for your help but need to cut my losses and resetting to factory. I may have made a setting change along the way that's causing the issue. If not, this will help me narrow down my problem anyway.