Re: GW (LAN1, LAN2, ADSL) config

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On 04/20/2010 05:48 PM, j.halifax . wrote:
>>>
>> Is IP forwarding on?
>>
> Yes, it is.
> 
> 
> 
>> ------------ Původní zpráva ------------
>> Od: Terry Polzin <[email protected]>
>> Předmět: Re: GW (LAN1, LAN2, ADSL) config
>> Datum: 20.4.2010 19:03:39
>> ----------------------------------------
>> On Tue, 2010-04-20 at 15:31 +0200, j.halifax . wrote:
>>> Hi All,
>>>
>>> please help me kindly to reconfig my default GW (Fedora 12).
>>>
>>> The GW has 3 active Ethernet cards:
>>> eth0 - connected to Internet ADSL router (incl. VPN, pptpd)
>>> eth1 - not used
>>> eth2 - LAN1
>>> eth3 - LAN2.
>>>
>>> I had everything working fine but due to some problems I lost 
>>> the configuration of the GW and I can't get it working again.
>>>
>>> (1) The Internet access (LAN1 -> GW -> Internet) is working fine.
>>> (2) The access of  (Internet -> GW -> LAN1 / LAN2) is ok incl. VPN
>>> (3) I can not access LAN2 neither from LAN1 nor from GW box
>>>
>>> Traceroute shows that for (3) packets don't go to eth3 (LAN2) as
>>> they should, but they fall down to eth0 (default gw).
>>>
>>> Can you please advise me what I need to set-up (iptables) in the GW?
>>>
>>> Thank you so much for your kind help.
>>>
>>> Regards,
>>> jh
>>>
>> Is IP forwarding on?
>>
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>>
>>


As another person asked, please do netstat -rn
Please also do /sbin/ifconfig -a

When debugging a routing problem, we need to see your routing table.
It's also good to see the interfaces.

I would be surprised if the problem were iptables related.

Sounds more like the problem is routing table related.

I'm assuming you haven't done anything with the /sbin/ip command
like policy routing.
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