[LARTC] Terrible problem, some men in my net changed their MACs! :/

[Krystian Antoni]

for user verification pptp can be used. its free :-)

On 5/31/05, cristian_dimache at rtanet.ro <cristian_dimache at rtanet.ro> wrote: 
> 
> Yes, I have this problem too. And I came up with two ideas: one money
> comsuming, one time consuming.
> 
> Money comsuming: get management switches everywhere, and limit MAC
> learning per port. My network amounts to 500+ stations, over a preety wide
> area (all on ethernet), costs evaluated at 30.000$. Rather expensive, ha?
> 
> Time consuming: get into every windows workstation a program that alows
> network connection if MAC is unchanged from the one stored localy in an
> encrypted file.
> 
> Boss evaluated my ideas, and, guess what? I am now working on the program
> described above.
> 
> It will be publicly available, of course...
> 
> > On Mon, 30 May 2005 20:41:20 +0200 Konrad <kcem at tlen.pl> wrote:
> >
> >>Is any way to detect changed MAC adresses?
> > I have been working on this for some time. You can try the current
> > version:
> > http://shurdeek.routehat.org/tmp/dhcpwatch2.pl
> >
> > (please don't ask how it works, I'm pretty busy now :-)).
> >
> >>Someone taught change MACs peoples in my network and I have problems.
> > Yeah I know, I have seen this too.
> >
> >>E.g. Two computers working on one MAC, and one IP (static ARP and DHCP).
> > Exactly.
> >
> >>WinXP is screaming some message... that two computers or more have the
> >>same IP.
> > Actually this happens when people use the same IP but a *different* MAC.
> >
> > Yours sincerely,
> > Peter
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> >
> 
> 
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-- 
Miłego Dnia
Krystian Antoni
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