I'm tryng a Cisco 1941 router on my NBN HFC modem, and it's not working. However, if i plug the WAN side into my home network using the old Telstra modem and a laptop into the LAN side, it works fine. The NAT stats are there, the translations are there, i can ping 220.127.116.11 etc. Gets a DHCP ip from my home network ok on the WAN interface. basic config and it's working great. but if i plug the nbn modem into the WAN side and turn off the old telstra modem it doesnt work. it gets a WAN IP ok, and from the 1941 console i can ping 18.104.22.168, but NAT just seems to stop working. WTF am I doing??? Regards, g@z.