Simple Network Question: Part 2

[Dennis Mattingly]

I have (another) simple question involving my router.

Is this a Linux Bug, or simply a Bad Router?

1) My internet is perfect (normal setup)
2) Plug my computer internet directly into ethernet router
3) $ ping 192.168.1.1
network is unreachable

So, is this my router, do I need to turn-off network manager, Linux bug,
what next?

Thanks in advance

[Tait Clarridge]

On Thu, 2009-11-05 at 16:06 -0500, Dennis Mattingly wrote:
> I have (another) simple question involving my router.
>
> Is this a Linux Bug, or simply a Bad Router?
> My internet is perfect (normal setup)
> Plug my computer internet directly into ethernet router
> $ ping 192.168.1.1
>
> network is unreachable
>
> So, is this my router, do I need to turn-off network manager, Linux
> bug, what next?
> Thanks in advance
>
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What is the IP of your computer?

What kind of router do you have?

If I am reading this right, you are unplugging the Modem from your Linux
computer and then putting it in the Router. I assume your computer is
also plugged into the network router.

Is this correct?

[Athmane Madjoudj]

On Thu, Nov 5, 2009 at 10:06 PM, Dennis Mattingly
 wrote:
> I have (another) simple question involving my router.
>
> Is this a Linux Bug, or simply a Bad Router?
> My internet is perfect (normal setup)
> Plug my computer internet directly into ethernet router
> $ ping 192.168.1.1
>
> network is unreachable
>
> So, is this my router, do I need to turn-off network manager, Linux bug,
> what next?
>
> Thanks in advance

Some router (like mine) has a different ip (192.168.1.254)

To discover your router's ip :

$ route

or

Discover all active ip on your network using nmap:
$ nmap -sP 192.168.1.1-254

NB:
Some router has a firewall that block ICMP traffic (pings)

[Tait Clarridge]

On Thu, 2009-11-05 at 22:16 +0100, Athmane Madjoudj wrote:
> On Thu, Nov 5, 2009 at 10:06 PM, Dennis Mattingly
>  wrote:
> > I have (another) simple question involving my router.
> >
> > Is this a Linux Bug, or simply a Bad Router?
> > My internet is perfect (normal setup)
> > Plug my computer internet directly into ethernet router
> > $ ping 192.168.1.1
> >
> > network is unreachable
> >
> > So, is this my router, do I need to turn-off network manager, Linux bug,
> > what next?
> >
> > Thanks in advance
>
> Some router (like mine) has a different ip (192.168.1.254)
>
> To discover your router's ip :
>
> $ route
>
> or
>
> Discover all active ip on your network using nmap:
> $ nmap -sP 192.168.1.1-254
>
> NB:
> Some router has a firewall that block ICMP traffic (pings)
>
> -- 
> Athmane Madjoudj

When it says "Network is Unreachable" I assume this means he has no
route to begin with.. So he may not be able to do the above.

Otherwise it would spit out "Destination Host Unreachable" if it could
get to the network and/or 100% packet loss if the router IP was
different.

[Mikkel]

Dennis Mattingly wrote:
> I have (another) simple question involving my router.
>
> Is this a Linux Bug, or simply a Bad Router?
> My internet is perfect (normal setup)
> Plug my computer internet directly into ethernet router
> $ ping 192.168.1.1
>
> network is unreachable
>
> So, is this my router, do I need to turn-off network manager, Linux bug,
> what next?

A lot depends on how you connect to the Internet. If you are
connected directly to the Modem, and have the computer set up to
connect using something like PPPoE, then you have to make a few
modifications when you add in a router between the computer and the
modem. The usual change is to set up the router to do the PPPoE for
you, and then change your computer to use DHCP and turn off the
PPPoE connection.

Another thing to keep in mind is that the network and default
gateway that the computer is set up to use man not give you a route
to the 192.168.1.0 network. For example, my DSL modem defaults to
192.168.0.1. If I were connected to the modem directly, my computer
would be set up to use the 192.168.0.0 network with the gateway
being 192.168.0.1. With the default setup, I would also have to
configure the computer to make the PPPoE connection. But I have the
DSL modem configured to do that, and I have the router configured to
use DHCP to get its WAN IP address.

So, without a lot more information about your setup, it is not
possible to answer your question.

Mikkel

[SternData]

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On 11/05/2009 03:06 PM, Dennis Mattingly wrote:
> I have (another) simple question involving my router.
>
> Is this a Linux Bug, or simply a Bad Router?
> My internet is perfect (normal setup)
> Plug my computer internet directly into ethernet router
> $ ping 192.168.1.1
>
> network is unreachable
>
> So, is this my router, do I need to turn-off network manager, Linux bug,
> what next?
>
> Thanks in advance

What do you get when you type

ifconfig eth0

in a terminal sessino?

How is your card configured, through network or network manager?  Are
you set up to use DHCP or do you have a static configuration set?

- --

Steve
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[Cameron Simpson]

On 05Nov2009 15:50, Steven Stern  wrote:
| What do you get when you type
|   ifconfig eth0
| in a terminal sessino?

Also include the output of:

netstat -rn

which will show your routing table.