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Re: [PLUG] network fixer hat
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You're correct, it's being passed to the default gateway. You won't
be able to talk to anything in the 192.168.0.0/24 subnet without a NIC
on that subnet or a router that knows about it. Even if you were to
add a route for that subnet to your routing table, the return traffic
won't know how to get back to the 10.10.10.0/24 subnet.
However, if the host your traffic is originating from is a linux host,
you can get around this by adding an alias to your NIC with an IP on
the other subnet. For example, to add an alias with an IP of
192.168.1.12 to eth0, you would do the following:
ifconfig eth0:1 192.168.1.12 netmask 255.255.255.0
and you'll notice the appropriate route is now there and traffic
should flow normally.
~Paul
On Aug 28, 2009, at 1:22 PM, Eric wrote:
> Once again I'm called on to wear my "network fixer" hat... but this
> time it's in
> my own office!
>
> I use an internal 10.10.10.0/24 IP range in my home/office.
> Unfortunately, most
> devices that I'm going to add to the network to configure (wireless
> routers,
> NAS, etc) have 192.168.[0|1].0/24 addresses. When I plug in the new
> device and
> try to access it via http or tftp from my Linux workstation - I get
> nothing. Is
> that because any request outside the 10.10.10.0/24 range falls
> through the
> routing table to "default" and then gets sent to the gateway - which
> drops it as
> non-routable?
>
> How can I "tweak" my routing on the Ubuntu (8.10) workstation to see
> these types
> of devices without messing up anything else?
>
> Here is the output of the route command:
>
> ~$ route
> Kernel IP routing table
> Destination Gateway Genmask Flags Metric Ref
> Use Iface
> 10.10.10.0 * 255.255.255.0 U 1
> 0 0 eth1
> link-local * 255.255.0.0 U 1000
> 0 0 eth1
> default polaris 0.0.0.0 UG 0
> 0 0 eth1
>
> I'm thinking this might work:
>
> route -v add -net 192.168.0.0 netmask 255.255.0.0 -dev eth1
>
> Would I add this permanently or just when I needed it?
>
> Thanks,
> Eric
> --
> # Eric Lucas
> #
> # "Oh, I have slipped the surly bond of earth
> # And danced the skies on laughter-silvered wings...
> # -- John Gillespie Magee Jr
> ___________________________________________________________________________
> Philadelphia Linux Users Group -- http://www.phillylinux.org
> Announcements - http://lists.phillylinux.org/mailman/listinfo/plug-announce
> General Discussion -- http://lists.phillylinux.org/mailman/listinfo/plug
___________________________________________________________________________
Philadelphia Linux Users Group -- http://www.phillylinux.org
Announcements - http://lists.phillylinux.org/mailman/listinfo/plug-announce
General Discussion -- http://lists.phillylinux.org/mailman/listinfo/plug
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