Re: Linux router configuration??

[Raghuveer <rvk@xxxxxxxxxxx>]

Ryan Johnson wrote:

> Could you send me the output of route -n?
>
> Your two network cards should not be in the same network, if they are, it is not a rotuer. The whole purpose of a router is a gateway for clients on a network to get to another network that they (clients) do not know how to reach.
>
> Ryan
>  
Anyway thanks Ryan, I just wanted to confirm from you, whether we can 
have two NIC's in a m/c connected to a same network.
Output of route -n is :-

Destination     Gateway         Genmask             Flags     Metric  
Ref    Use Iface
192.168.1.0     0.0.0.0             255.255.255.0     U           
0           0        0     eth1
192.168.1.0     0.0.0.0             255.255.255.0     U           0      
    0        0     eth1
127.0.0.0         0.0.0.0             255.0.0.0             U           
0           0        0     lo
0.0.0.0             192.168.1.2     0.0.0.0                 UG        
0           0        0     eth0

what I was expecting was:-

Destination     Gateway         Genmask             Flags     Metric  
Ref    Use Iface
192.168.1.0     0.0.0.0             255.255.255.0     U           
0           0        0     eth0
192.168.1.0     0.0.0.0             255.255.255.0     U           0      
    0        0     eth1
127.0.0.0         0.0.0.0             255.0.0.0             U           
0           0        0     lo
0.0.0.0             192.168.1.2     0.0.0.0                 UG        
0           0        0     eth0

Regards
-Raghu

>  
>
> > Ryan Johnson wrote:
> >
> >    
> >
> > > I am going to assume you want the most basic router, just two interfaces.
> > >
> > > 1.) Make sure both network cards have been detected.
> > > ifconfig eth0
> > > ifconfig eth1
> > >
> > >      
> > Can I have both the network cards in the same n/w...? Becoz If I try to 
> > use both NIC's with the same n/w, running <$ route -n> we can see either 
> > eth1 or eth0 repeated twice. Pls let me know where is the problem..?
> >
> > Regards
> > -Raghu
> >
> >    
> >
> > > 2.) Set up each interface on its own network, make sure the interface has been activated, you can use ifconfig for this.
> > > 3.) issue the command
> > > echo 1 > /proc/sys/net/ipv4/ip_forward
> > > to enable ip fowarding, w/o this the kernel will not send packets between interfaces
> > > 4.) set the clients behind the router to point to the internal ip of your router
> > >
> > > Any changes made to the system will have to be initialized during the boot process.
> > >
> > > Of course if you have ip addresses that you would like to nat/masq behind the router, you will have to use iptables.
> > >
> > > You really should be more specific on your needs.
> > >
> > > Good luck.
> > >
> > >
> > >
> > >
> > >      
> > >
> > > > Good morning at all, thanks for previous help, but I have another ask. I have a few experience of Linux world's, and I need to configure a Linux PC as router, what are the steps? What do I do?
> > > > Thanks.
> > > >   
> > > >
> > > >        
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> > >
> > >
> > >
> > >      
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> >    
>
>
>  


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