Originally Posted by nolook
they won't put it in bridge mode as they don't support 3rd party routers.. i am looking for a non double NAT solution
Just to clarify a few things:
1. The Firewall Security settings on the Actiontec router are NAT/Low/Medium/High. The least security is NAT, which means "NAT only, no ports blocked". Selecting one of the other 3 settings pops up a long list of internet protocols, some of which are checked as permitted, other unchecked to mean not permitted. The 3 options Low/Medium/High just offer 3 pre-set levels of increasing blocking in the list, but you can customize the list by checking/unchecking the individual protocols. Just use the default NAT unless you have some reason for blocking a specific protocol.
2. The reason why Telus doesn't want to allow customers to bridge the router section of the Actiontec and use it as a pure modem is because it is designed to support their Optik IPTV service as well as customer internet. The router provides dedicated bandwidth for the TV service, supports HPNA to connect to the TV box via coax, and uses IGMP to set up multicast to multiple TV boxes in the home. Technically the Optik IPTV service can work with other user-provided routers, but there may be TV issues that the user doesn't fully understand, and Telus doesn't want the support hassle of dealing with that.
3. I'm not sure why the Chromecast wouldn't work with the Actiontec (I suspect that Telus has enabled AP isolation with no option to turn it off), but there's nothing stopping you from attaching your own router to one of the LAN ports of the Actiontec and putting it in the DMZ of the Actiontec. Yes, there will be double-NAT, but the Chromecast isn't affected by that when you use it with your own router.