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Forum Discussion
RS300 and D7800 will not connect to ISP (to the internet)
Despite following instructions and re-booting many times in different sequences my new RS300 paired with a D7800 (Modem/Router) in "Modem Only" mode will not connect to my ISP (PlusNet) and, therefor...
Thanks for your suggestions, I agree that it certainly looks like a Nat problem (clash).
(The reason I have not replied earlier is that I have other things I need to do and trying various permutations of setting takes up a lot of time!)
Finding the solution is the problem and whilst the D7800 can be set to Modem Only Mode, Netgear make no mention of this in its manual.
From past experience this sort of problem will probably have a stupidly simple solution, the problem is finding the solution!
As far as the RS300 is concerned, Netgear do not tell us how the RS300 communicates with the D7800 Modem via the Modem link, (I presume it uses ethernet, if so, with what addresses), in order to tell it what to do. Currently the D7800 (Modem.Router) is set to 192.168.100.1 as the gateway, The settings are greyed out once it is operating in Modem Only Mode. The RS300, however, failed to connect whilst it was set to its default of 192.168.1.1, (therefore, I believe, no NAT clash).
The "Wizards" fail because they can find no Internet connection, but presumably that is because the Modem has not been told where to look.
My knowledge of IP setups and protocols is limited but I am not keen on using DMZ because of the security warnings.
By the way I have set up my network using 192.168.100.xxx (I believe this is fairly standard and avoids using 192.168.1.xxx (which is possibly too common).
This article is for cable gateways however could be applied in same situation for D series DSL gateways:
https://kb.netgear.com/27191/How-to-set-the-cable-modem-router-to-be-on-modem-only
I would avoid using 192.168.100.1 as this is a common IP address for cable modems and gateways and possible some DSL modems/gateways and is not a standard common network subnet to use for the main home network. These use this IP address as the management web page access IP address.
I recommend using 192.168.0.1 on the RS. I use this IP address on my home production network for years and have ran into any conflicts with modems or gateways using 192.168.1.1.
NG routers should be auto detecting any IP address conflicts with other routers upstream using 192.168.1.1 and should change to something else, i.e. 10.x.x.x.
I think if you can get the D7800 in to modem only mode, then you can use 192.168.1.1 or .0.1.