Re: SSH between computers on LAN

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


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