RFC 1918 has to do with private IP ranges non-routable to the internet (10.0.0.0 - 10.255.255.255).
Keep in mind every time you connect a new device to the homehub 2000 you'd have to reboot the gateway, so it learns the new MAC address of the client connecting to it, that may be part of your issue. Then, it seems that you have two NAT routers after each other, you may want to leave only one to serve DHCP addresses, DNS, etc. and configure the second one as an access point only, as per this article:
http://www.speedguide.net/articles/h...ess-point-2556
Or, you can just elave it as it is, if it works for you
As far as security, you are behind a NAT router in either case, so you do have basic protection that does not leave many ports open to the internet.
I hope this helps.
Bookmarks