[SOLVED] Two networks on two interfaces

Sigg3.net · 09-15-2012, 09:04 AM

I am setting up LinuxMCE on my home network, and typically the LMCE server wants to be DHCP at 192.168.80.1.

The LMCE box has 2 network cards, and I have a DIR-825 that currently acts as DHCP for the entire network (and wifi AP).

I want to be able to access the internet (especially wirelessly) when/if the LMCE box is off. The current plan goes something like this:

Code:

	ISP modem
	   |
	DIR-825		192.168.20.1 network (DHCP)
	 |   |  
	 /   +		LMCE box gets 192.168.20.99 on eth0
    wifi     |
 	   LMCE		192.168.80.1 on eth1 (DHCP "downstream")
	     |
	     +		192.168.80.x (LMCE network)

How would I proceed to set this up in LMCE (Kubuntu 10.04) on the LMCE box, and what would I need to do to access stuff on the LMCE network from the DIR-825 network (is this only the subnet mask thing)? The DHCP server on LMCE should be active, since the auto-discovery and netboot stuff requires DHCP (AFAIK).

pingu · 09-15-2012, 10:25 AM

Your setup is pretty good, although I recommend setting static ip on LMCE eth0.
And make thta an ip outside the DHCP scope on DIR825.

Now to access LMCE network, you need to add a route to it.
You can put it on each computer, or maybe on your DIR825.
That should be all.

Sigg3.net · 09-15-2012, 10:34 AM

Thanks!

Now, imagine I'm a complete *tard, and need easy instructions..

Static ip, check.
Outside scope? That is, have one network 10.0.0.1 and the other 192.168.80.1 (but same subnet mask?)?
Routs in /etc/resolv.conf?

pingu · 09-15-2012, 10:54 AM

Oki.

On your DIR825, I believe network & DHCP is already configured.
To add a route to LMCE network:
Browse to DIR825, go to Advanced->Routing
Fill in adress 192.168.80.0, netmasjk 255.255.255.0, gateway <the ip of LMCE eth0> metric=1, Interface will be the LAN interface.

That should be all needed to access LMCE network from "DIR" network.

LMCE I know nothing about, surely there's a network config guide or gui tool to configure that?
You don't need much, just set ip on it's WAN (eth0) and LAN (eth1) and configure DHCP.

That should be all.

Sigg3.net · 09-15-2012, 10:55 AM

Thanks, man! I think that should do it

Sigg3.net · 09-16-2012, 03:44 PM

Hmmm.. for some reason I can only select the WAN interface in Advanced-Routing.
This means that Status-Routing shows:

Code:

Destination IP 	Netmask 	Gateway 	Metric 	Interface 	Type 	Creator
192.168.80.0	255.255.255.0	192.168.80.1	1	INTERNET	STATIC	ADMIN

Seems to be a router issue with the DIR-825 and the current 2.05EU firmware. If you own a DIR-655 you can use this hack: http://forums.dlink.com/index.php?ac...e;topic=6422.0
See also: http://lizzi555.dyndns.org/655/StaticRoute.html

But it doesn't work on DIR-825 (uses asp), so I'll probably have to flash it to dd-wrt :P

Sigg3.net · 10-02-2012, 12:51 PM

Actually, the DIR-825 did the work beautifully w/o having to change firmware!

I was not able to ping from the machine writing this post, but I was able to ping from the LMCE machine and back. It turned out the firewall was enabled by default (good thing), and did not allow ICMP :P

Marking it as solved.