[44net] Routing

I have configured a Cisco router, duel Ethernet interfaces on on of my static Internet addresses. The IPIP tunnel comes up and with wireshark I can see traffic in both directions to 169.228.66.251 pinging devices in the wider 44. network I never see anything being returned. Does the gateway router automatically have the reciprocal return tunnel / routes added (as per the Encap file) or is this something that needs requesting? Is there a good 44.131.x.x address to test against? 73 Paul - G1DVA