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Q: Best way to lock down network from rogue computers?
Submitted By: sinister, 312 days, 12 hours, 16 minutes ago
Is there any way to lockdown a network to prevent unauthorized computers from plugging in, and also prevent them from setting an IP with another computer on the network (thus causing ip conflicts and havoc on the network)?
Please try not to post duplicate answers... if you see an answer that you want to post, just add a vote to it and you can add a note as well. Thank You
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Smart Switches
Submitted By: anon ( 312 days, 12 hours, 8 minutes ago )
IF you have a smart switch, you can deactivate ports and only have ports open for a certian mac address. I believe any of the higher cisco models will do this fine. But the "dumb" switches will not do this. This does however require knowing every mac address and physical port that they are on.
1
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Sounds like wired...
Submitted By: L0t3k ( 312 days, 11 hours, 56 minutes ago )
You said "plugging in", so I assume you mean a wired network. You can control what IP's people get according to their mac address via the DHCP server. Set up reservations on the network for authorized users. If the person is going through the trouble of finding the MAC of a target machine and spoofing their MAC to snag the reservation and bounce someone, you'll probably want to implement a gateway sort of authentication for every user. You'll often see solutions like this on large school campuses... and FOSS options exist for it.
1
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Mac Filtering and a locked closet.
Submitted By: Beamsjr ( 312 days, 2 hours, 21 minutes ago )
I would definetly use mac filtering on the wireless, and as far as people pluging in to the router, keep it in a locked closet.
0
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more info needed
Submitted By: anon ( 312 days, 12 hours, 11 minutes ago )
if this is a wireless network, setup WPA encryption to keep unwanted people off. if it is not a wireless network how are they going to plug in without you knowing? then just unplug them. a router handles all ip address assignments.
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2
Submitted By: anon
Submitted By: vettelovr
0
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Any one or more of the following will work
Submitted By: Marjon ( 312 days, 11 hours, 1 minute ago )
As per the other posts, depending on if this is a wired or wireless network you've essentially got 3 options: