2nd Modem for MAC filtering

**MattJust** · June 5th, 2011, 02:42 AM

Hi All

I have an ADSL2+ Wireless/LAN Router modem (I'll call this RM1) - a Thompson TG782T
& I have a Wireless/LAN Router (WR2) - a Linksys wrt54gl

My problem is :
RM1 has the modem for the internet, but NO filtering.
WR2 has the MAC filtering I need for my sub-network.

Diagram to explain here ->
Network configuration2 | Flickr - Photo Sharing!

I want wireless users to connect to the MAC filtering feature of WR2
The rest can have un-restricted internet access on RM1 through the wired LAN ( I have not set up wireless for this device)

WR2 (ethernet port 1) is wired to RM1 (port 2).
both devices are in the same room next to each other (different wireless channels 5 & 11)

So far I have set up two subsets of the IP range
RM1 10.0.0.140-150 and WR2 192.168.0.201-254

RM1 is set to IP 10.0.0.138 (the default)
WR2 is set to IP 192.168.0.200 and DHCP disabled

Result of above setup :
-----------------------------
RM1 works as required
PC connected to RM1 (wired) can see RM1 home IP + internet but not WR2 192.168.0.200

WR2 connects to RM1, but has no internet connection.

PC connected to WR2 (wireless) CAN'T see either router - but if I want MAC filtering then I need to be able to do this I would have thought ?

Any help on this would be (virtually) appreciated

Thanx Matt

**GroundZero3** · June 6th, 2011, 07:23 AM

You have two different subnets that has no layer three routing. Change WR2 to use the network/subnet as RM1. What port are you plugging RM1 into WR2? Does it get a link light between the two devices?

For the wireless channels I suggest using 1,6,11

**MattJust** · June 9th, 2011, 10:19 AM

Thanks for the reply - sorry, the slow response is because I lost connection mucking about with the router setup.

>>>You have two different subnets that has no layer three routing.
not sure where you are reading that from? the subnets are default 255.255.255.0

>>>Change WR2 to use the network/subnet as RM1.
that has been tried without success unfortunately, it turn's WR2 into a switch and it bypasses the features that I want WR2 to use.
WR2 needs to act as a gateway to RM1

>>>What port are you plugging RM1 into WR2? Does it get a link light between the two devices?
"WR2 (ethernet port 1) is wired to RM1 (port 2)"
The routers both have port sensing - both link lights are on.

>>>For the wireless channels I suggest using 1,6,11[/QUOTE]
ok

I am trying some of the advanced routing options: Setting to gateway and static router setup using a router table. Not many clues out there that I could find so far.

**GroundZero3** · June 9th, 2011, 10:24 AM

You have a 10.x.x.x network and a 192.x.x.x those are two different network subnets. Just because they are both 255.255.255.0 doesnt mean they will talk to each other.

Pretty much you are making WR2 into an access point so changing the ip address shouldnt affect how the device operates. If you change it to the same subnet it should allow you to continue doing mac address filtering.

**MattJust** · June 9th, 2011, 12:59 PM

ok thanks, appreciate the explanation - i think I understand

I was thinking the third field was the determining factor for IP subnet communication.

I'll put RM1 as 10.0.0.138
with LAN connections .140 to .150

and WR2 as 10.0.0.200
with WLAN connections .201 to .250

**nemowolf** · June 9th, 2011, 01:02 PM

Originally Posted by GroundZero3

You have a 10.x.x.x network and a 192.x.x.x those are two different network subnets. Just because they are both 255.255.255.0 doesnt mean they will talk to each other.

Pretty much you are making WR2 into an access point so changing the ip address shouldnt affect how the device operates. If you change it to the same subnet it should allow you to continue doing mac address filtering.

To expand on what he is saying and perhaps to clarrify:

Your subnet mask tells your devices what is "Inside" and what is considered "Outside" ... for instance a 192.168.1.1 with a subnet mask of 255.255.255.0 will consider any 192.168.1.x device as Inside and anything else as Outside.

If you have your gateway/modem on a 10.x.x.x with a 255.255.255.0 subnet, then the only Inside device is the router you have. Any traffic that is brought into the gateway from the router will end up going out to the internet because the only device you have on it is the switch.

By changing the IP of the entire network to the same scheme, 192.168.1.1 for instance, then everything is able to communicate and talk to each other Inside. Your gateway/modem will end up being the main hub and set as the gateway IP on all devices while your router gets an IP of 192.168.1.2 and acts as the AP for the network. This will allow your Wireless connections to speak with anything wired and anything you plug directly into the gateway/modem should you so desire and there is the proper credentials/sharing. Wired connections through the gateway/modem wont be mac filtered but any wireless connections made through the router will be filtered and i believe that is your goal no?