SSH between computers on LAN

[Karl F. Larsen]

Aart Koelewijn wrote:
> On Sat, 24 Jan 2009 06:43:27 -0700, Karl F. Larsen wrote:
>
>   
>> Aart Koelewijn wrote:
>>     
>>> On Sat, 24 Jan 2009 06:10:22 -0700, Karl F. Larsen wrote:
>>>
>>>
>>>       
>>>> Nils Kassube wrote:
>>>>     
>>>>         
>>>>> Karl F. Larsen wrote:
>>>>>   
>>>>>   
>>>>>           
>>>>>>     I did a traceroute from this computer looking for the laptop and
>>>>>>     it
>>>>>> failed. But a traceroute from the laptop works to this computer.
>>>>>>     
>>>>>>     
>>>>>>     
>>>>>>             
>>>>> Are you using the correct IP address for the laptop? If you try to
>>>>> ping the IP of the wireless port of the laptop while it is actually
>>>>> connected by wire, you won't get a reply. Try the IP of the wired
>>>>> port instead. Run the "ifconfig" command on the laptop to find out
>>>>> which IP address it has on the wired port.
>>>>>
>>>>>
>>>>> Nils
>>>>>
>>>>>
>>>>>
>>>>>           
>>>>     I was trying Traceroute to see if it might explain why a ping to
>>>>     the
>>>> laptop fails. I do ifconfig on the laptop to get it's ip.
>>>>
>>>>     Still do not understand how this setup fails. I have 2 routers.
>>>>     The
>>>> second router gets Internet from the first. Right now the DSL-router
>>>> is 192.168.0.x and the Belkin Router is 192.168.1.x wired and
>>>> 192.168.2.x from the WiFi port. Any computer on any port will get fine
>>>> two way Internet from the DSL. But it is one way from the DSL-router
>>>> to the Belkin router. A computer on the Belkin can ping a computer on
>>>> the DSL-router but not the other way. It's an odd problem. I expect
>>>> the Belkin router is not really a router.
>>>>
>>>>
>>>> Karl
>>>>     
>>>>     
>>>>         
>>> I don't think a computer on the first router will know where to find a
>>> computer on the second router if you don't set a explicit route. It
>>> will try to find it through your default route, which will point to the
>>> internet and not to your second router. The Belkin will know how to
>>> find a computer on your first router because its default route will be
>>> set to the first router. It will have to be, otherwise it won't be able
>>> to find the internet.
>>>
>>> An explicite route can f.i. be set by ifconfig.
>>>
>>> Aart
>>>
>>>
>>>
>>>       
>>     Thank you for your excellent description of my problem. I have never
>> tried to use ifconfig in that way. I will look at it's man page. I
>> recall using routes back in early Slakware days. I think they were put
>> in /etc/routes/ then. Confusing back then too.
>>
>> Karl
>>     
>
> Thinking again while walking the dog, (you should always think at least 
> twice) route may be a better command, look at it's man page. Long time I 
> had to use it too.
>
> Aart
>
>
>   
    I did look at route and it says a route defined by ifconfig ... but 
later shows examples of route add things. I have not figured out where 
to put the new route definition, or, what it looks like :-)

Karl


-- 

	Karl F. Larsen, AKA K5DI
	Linux User
	#450462   http://counter.li.org.
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