Cannot open port 9 on ERPOe5

Hi,

I am trying to open port 9  to implement WakeOnLan in my network.  I use Firewall/NAT>>>porforwarding to the main computer in the LAN (192.168.1.6), However I cannot manage to open it. I can easily open other ports but not this one. The LAN interface I select is "switch0" because I have a VLAN working.

Any help would be appreciated

Thanks