can't ping the internet

[Rodney Davis]

Yes, I can ping both localhost and my router but nothing
outside of that.

Thanks,

rodney

-----Original Message-----
From: Chris Wong [mailto:wongc at math.ed.hawaii.edu]
Sent: Friday, February 09, 2001 12:19 PM
To: Linux & Unix Advocates & Users
Subject: [luau] Re: can't ping the internet


On Fri, 9 Feb 2001, Rodney Davis wrote:

> I ran tcpdump and I can see traffic so I think it is not a
> hardware problem.
>
> netstat -rn returns the following:
>
> 206.127.244.32	0.0.0.0		255.255.255.240   U 0 0 0 eth0
> 127.0.0.0	0.0.0.0		255.0.0.0	   U 0 0 0 lo
> 0.0.0.0		206.127.244.33	0.0.0.0		   U 0 0 0 eth
>
> I am not sure what the middle one is.  It does not appear on any
> other machine in my office.

That's localhost. Leave it be....removing that might cause problems...
WILL cause problems.

> Should I delete this?  And if so, how do I do that? route del 127.0.0.0
> doesn't work!

Can you ping the router? The 206.127.244.33?

> -----Original Message-----
> From: Dusty [mailto:dusty at sandust.com]
> Sent: Friday, February 09, 2001 10:11 AM
> To: Linux & Unix Advocates & Users
> Subject: [luau] Re: can't ping the internet
>
>
> Run "tcpdump" or someother sniffer on the system (on teh interface that
goes
> to the internet).  If you see traffic your hardware and physical
connection
> are ok.  If not it is a hardware problem.
>
> The typical problem is your defaultroute.  Your "netatat -rn" should have
> lines something like this:
>
> 192.168.1.0   0.0.0.0  255.255.255.0  eth0
>
> 0.0.0.0   192.168.1.1   0.0.0.0   eth0
>
> You should have one route for your subnet and one route that is 0.0.0.0 to
> your defaultrouter.
>
> Dusty
>
>
>
> > > I need help with configuring my linux box's network configuration.  I
> > > can ping localhost and the router but I cannot ping any machines
> > > outside the network.  ifconfig shows all of the right addresses and I
> > > have looked at /etc/hosts and /etc/networks and they appear to be the
> > > same as other machines on this network. When I use the netstat command
> > > nothing shows "connected". Can anyone point me in the right direction
> > > for resolving this dilemma?
> >
> > There are so many things that could go wrong with this that I couldn't
> > even begin.
> >
> > Check your default route. (netstat -rn)
> >
> > Double check your network settings. Triple check them.
> >
> > Check your hub.
> >
> > check your resolv.conf. See if your DNS server is working.
> >
> > Check your ethernet card.
> >
> > netstat won't tell you what you need to know. I can't diagnose the
problem
> > without getting details. It's like telling your mechanic, my car doesn't
> > work.
> >
> >
> >
> >
> >
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