[LARTC] One interface forwarding (wireless ad-hoc

[LARTC] One interface forwarding (wireless ad-hoc

[Steven Y. Ko]

Hi,

I'm wondering if there's any simple solution. This problem 
looks very simple, so maybe there's a simple solution that 
I'm missing, but I couldn't do it yet.

I'm configuring an wireless ad-hoc network with three 
laptops;

A ---- B ---- C

where A and C can only talk to B, and B can talk to both A 
and C. A and C cannot talk to each other. I'd like to 
configure B so that A can talk to C via B (and vice versa). 
The addresses are,
A: 192.168.0.1
B: 192.168.0.2
C: 192.168.0.3

Since this is an wireless ad-hoc network, every machine has 
only one (wireless) interface, so B should receive a packet 
through its interface eth0 and forward it through eth0 
again. Currently, A, B, and C only have the same basic 
routing table;

Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric 
Ref    Use Iface
192.168.0.0   *               255.255.255.0   U     0      
0        0 eth0
169.254.0.0     *               255.255.0.0     U     0      
0        0 eth0
127.0.0.0       *               255.0.0.0       U     0      
0        0 lo

B cannot forward packets with this routing table. Is there 
any solution?

Thanks,
Steve
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Re: [LARTC] One interface forwarding (wireless ad-hoc mode)?

[Tóth Nándor]

Hi!

Steven Y. Ko wrote:
> Hi,
> 
> I'm wondering if there's any simple solution. This problem 
> looks very simple, so maybe there's a simple solution that 
> I'm missing, but I couldn't do it yet.
> 
> I'm configuring an wireless ad-hoc network with three 
> laptops;
> 
> A ---- B ---- C
> 
> 
> B cannot forward packets with this routing table. Is there 
> any solution?

Maybe:
# ip forward is a must for a gateway
echo "1" > /proc/sys/net/ipv4/ip_forward


-- 
Udv,
   Nandor
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Re: [LARTC] One interface forwarding (wireless

[Steven Y. Ko]

> Maybe:
> # ip forward is a must for a gateway
> echo "1" > /proc/sys/net/ipv4/ip_forward

I'm sorry that I forgot mentioning that I turned it on. Also
there's no firewall, either. Thank you so much for your
answer, though. I'm still figuring out how to do it.

- Steve
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Re: [LARTC] One interface forwarding (wireless ad-hoc mode)?

[Tóth Nándor]

Hi!

Steven Y. Ko wrote:
>>Maybe:
>># ip forward is a must for a gateway
>>echo "1" > /proc/sys/net/ipv4/ip_forward
> 
> 
> I'm sorry that I forgot mentioning that I turned it on. Also
> there's no firewall, either. Thank you so much for your
> answer, though. I'm still figuring out how to do it.

It should work.
If i were you, i would play with tcpdump a little bit, to narrow where 
the problem is.



-- 
Udv,
   Nandor
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