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List:       focus-sun
Subject:    Re: hardware adress
From:       Eva Brucherseifer <eva () RT ! E-TECHNIK ! TU-DARMSTADT ! DE>
Date:       2000-08-14 15:30:40
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Thanks for the fast response!

Well, that's what I thought first as well, but ALL of my machines have this
message! So I think it is either a network problem (Could that be? We are still
using BNC) or (I hope not) a security problem.

Greetings,
eva

> > 
> > Hello,
> > 
> > the last weeks I had some stange messages in my logs on various Solaris 7
> > boxes. Since I am not sure that it isn't a security problem I ask you -
> > maybe someone can help me.
> > 
> > The first type of message ist the following:
> > 
> > Aug 13 12:39:12 testbox ip: [ID 903730 kern.warning] WARNING: IP: Hardware \
> > address '08:00:20:x:x:x' trying to be our address x.x.x.x! 
> > I replaced the exact numbers, but the ip address and the hardware address are
> > the correct ones for the testbox. Is this a security problem?
> 
> You will see this message when another computer is placed on the
> network and is configured with the address of a computer already on the
> network.  This re-assignment of an existing IP address could have been
> caused by a simple transposition of digits, an incorrectly specified
> DHCP scope, or, heaven forbid!, by carelessness.
> 
> The fix is to find the box that was just placed on the network and
> assign it a unique IP address.  My technique to fixing this is to take
> the computer complaining to the boot prompt (assuming that this box had
> the correct IP address first) and wait until the other one comes back
> on the network.  I then login to it and sys-unconfig it.  Next step is
> to wait until someone complains and then correctly re-configure it.
> 
> If the machine in question is a PC the above won't work but, in this
> case, I usually walk around and check each PC individually looking for
> the machine in question.
> 
> Regards,
> Gregory Hicks
> ---------------------------------------------------------------------
> Gregory Hicks                           | Principal Systems Engineer
> Cadence Design Systems                  | Direct:   408.576.3609
> 555 River Oaks Pkwy M/S 6B1             | Fax:      408.894.3479
> San Jose, CA 95134
> 
> 
> > 
> > The other one is this on a NIS+ server:
> > Aug 13 12:49:34 testserver nisd[125]: [ID 777835 daemon.warning] Object \
> > hosts.org_dir.our.domain.net. isn't a directory. 
> > I get this messages whenever I do a niscat on a table.
> > 
> > I hope you can help me. By the way: I searched the AB2, but I couldn't find
> > anything. There doesn't seem to be a good documentation on messages, especially
> > kernel messages. A better documentation (man-pages?)would help to resolve these
> > problems.
> > 
> > Greetings,
> > Eva Brucherseifer
> > 
> 


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