Posted: Wed Nov 06, 2024 19:03 Post subject: Subnetting Assistance
I'm really not an expert on setting up subnets, I took some CCNA certification wayyyyyyy back in the day (like early 90s) and haven't touched subnetting since and am looking for a little help.
My main network (only network really, other than some remote VPN point to points I have setup between 2 other remote dd-wrt routers) is the only network i currently have setup. This is on the X.X.3 subnet.
I have a pretty elaborate Christmas Light show setup that utilizes multiple wireless controllers (circa 30 some individual controllers. Rough math, 500 lights per controller, 15,000 addressable lights). Each controller needs it's own IP.
I'd like to setup another DD-WRT based router / Wireless AP outside, but I want it on it's own subnet, but I need to be able to access all controllers from the X.X.3 subnet. The main server that will control the lightshow itself, will be on the .3 Subnet.
I don't believe the new subnet will need access to the internet, only the LAN to access the server, and for .3 devices to access whatever the new subnet is.
Would someone be able to help walk me through how I set this up on both routers so that communication / traffic is flowing correctly as I outlined?
EDIT: - I Will need the new subnet (.10) to be able to access the internet
Last edited by usaf-lt-g on Sun Nov 24, 2024 15:28; edited 1 time in total
Finally, add a static route to the primary router that points to the WAN ip of the new DD-WRT router as the gateway to the IP network behind it.
Hmmm.... did all this but seem to be having no luck. In fact, I can't even get the new router to be able to hit anything on the internet (i.e. can't even get to www.google.com) let alone locally.
The new router is in operating mode: Router
the router that's connected to the internet is in operating mode: Gateway
The new router has the following settings: Local IP Address: 192.168.10.1 / 24
Gateway - Blanked to 0.0.0.0
Local DNS - Blanked to 0.0.0.0
Under Advanced Routing, only the operating mode was changed to Router
Under Administration Commands --> Firewall. It is input as you have suggested above.
This router is receiving a WAN IP of: 192.168.3.198
The primary router has the following settings: Local IP Address: 192.168.3.1 / 24
Gateway - Blanked to 0.0.0.0
Local DNS - Blanked to 0.0.0.0
Everything else underneath Masquerade Route (NAT) is unchecked
Under Administration Commands --> Firewall
Nothing changed here. I already have 3 rules in there for some VPN traffic that are all working just fine, I haven't modified anything else.
I can access locally both the .10 subnet and .3 subnet from either router. But when on the .10 subnet, I can not access the internet.
Can you access 192.168.3.1 and 192.168.4.1 from 192.168.10.0?
The .10 Subnet (192.168.10.1) can access the .3 and .10 subnet which is what I want. But it cannot access the internet, which is on the .3. I can also get to 192.168.10.1 from any device on the .3.
The .3 is the only Gateway in the network and hosts the internet. But any device that gets added to the .10 can't get out to the internet.
