Why it will not work:1) you mess up with the outbound NAT rules.2) you are blocking private/invalid on OPNSense's WAN3) there isn't any rule that allows it (there should be, the default allow LAN to any, assuming you are connecting from OPNSense's LAN interface)4) your modem is bridged, possibly using a specific port for the bridge, while leaving the rest as a "local tech support" access. ie port 1 is bridged, port 2+3 are not, port 4 is for a VOIP setup.