[linux-help] Re: Ethernet problem

[Ryan Claycamp <claycamp@xxxxxxxxxxxxxxxxxxxx>]

At 01:50 PM 9/1/2000 -0500, you wrote:
> On Fri, Sep 01, 2000 at 01:14:04PM -0500, Ryan Claycamp wrote:
> > At 12:17 PM 9/1/2000 -0500, you wrote:
> > >>5. Can you establish any type of connection between the two, in either
> > >>    direction? Like telnet, ssh, or something else?
> > >
> > >Everyone, except cad1, can talk to mail.  Telnet is turned off, but ssh,
> > >pop, ping, etc. all get to and from mail.  I tricked cad1 into talking to
> > >mail by sshing into cad2 and then sshing into mail.  Mail cannot talk to
> > >cad1.  I just discovered that mail must think it is cad1.  I sshed from
> > >mail to cad1 and got mail's login screen and my directory on
> > >mail.  Depending on how cad1 is "feeling" connections to it can be made,
> > >but get dropped in a short time.  A minute or two later they can be 
> made again.
> >
> > The part about mail thinking it is cad1 got me wondering if mail was 
> really
> > pinging cad1.  It is not.  I watched net traffic and nothing left mail
> > while it pinged and heard from cad1.  I don't know what that means or how
> > to fix it.  Any ideas?
> >
> > Ryan
>
>
> I would start by making sure that every machine has its correct IP
> address. Don't simply look at the config file and see what IP address
> it is supposed to have, rather do an ifconfig as root and see what IP
> address it is using.
ifconfig reports that each computer has its right address.

> Then study you hosts file on all the machines to make sure that they
> all match with each other.
The hosts files are the same.  I even backed-up the hosts file on mail and 
created a blank one and nothing changed.
> As was mentioned in another post, this sounds like either a host name
> resoultion problem, or an IP problem (two machines having the same
> address).
Where else should I look for possible problems?

Ryan
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