Re: [LARTC] Linux router configuration??

[Raghuveer <rvk@gsecone.com>]

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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