for user verification pptp can be used. its free :-)<br><br>
<div><span class="gmail_quote">On 5/31/05, <b class="gmail_sendername"><a href="mailto:cristian_dimache@rtanet.ro">cristian_dimache@rtanet.ro</a></b> <<a href="mailto:cristian_dimache@rtanet.ro">cristian_dimache@rtanet.ro
</a>> wrote:</span>
<blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">Yes, I have this problem too. And I came up with two ideas: one money<br>comsuming, one time consuming.<br>
<br>Money comsuming: get management switches everywhere, and limit MAC<br>learning per port. My network amounts to 500+ stations, over a preety wide<br>area (all on ethernet), costs evaluated at 30.000$. Rather expensive, ha?
<br><br>Time consuming: get into every windows workstation a program that alows<br>network connection if MAC is unchanged from the one stored localy in an<br>encrypted file.<br><br>Boss evaluated my ideas, and, guess what? I am now working on the program
<br>described above.<br><br>It will be publicly available, of course...<br><br>> On Mon, 30 May 2005 20:41:20 +0200 Konrad <<a href="mailto:kcem@tlen.pl">kcem@tlen.pl</a>> wrote:<br>><br>>>Is any way to detect changed MAC adresses?
<br>> I have been working on this for some time. You can try the current<br>> version:<br>> <a href="http://shurdeek.routehat.org/tmp/dhcpwatch2.pl">http://shurdeek.routehat.org/tmp/dhcpwatch2.pl</a><br>><br>> (please don't ask how it works, I'm pretty busy now :-)).
<br>><br>>>Someone taught change MACs peoples in my network and I have problems.<br>> Yeah I know, I have seen this too.<br>><br>>>E.g. Two computers working on one MAC, and one IP (static ARP and DHCP).
<br>> Exactly.<br>><br>>>WinXP is screaming some message... that two computers or more have the<br>>>same IP.<br>> Actually this happens when people use the same IP but a *different* MAC.<br>><br>> Yours sincerely,
<br>> Peter<br>> _______________________________________________<br>> LARTC mailing list<br>> <a href="mailto:LARTC@mailman.ds9a.nl">LARTC@mailman.ds9a.nl</a><br>> <a href="http://mailman.ds9a.nl/cgi-bin/mailman/listinfo/lartc">
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http://mailman.ds9a.nl/cgi-bin/mailman/listinfo/lartc</a><br></blockquote></div><br><br><br>-- <br>Miłego Dnia<br>Krystian Antoni