Is there a methode of detecting a illegal router on a port?

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Sep 22nd, 2008
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We want to implement port security, illegal switches will be disabled but how about illegal routers or illegal wireless access points?

Has someone a methode for detecting routers and APs?



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Joseph W. Doherty Mon, 09/22/2008 - 09:22
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Most I've seen are not bulletproof. The major problem is something like NAT.

The best solution appears to be one that requires the host device to authenicate an encrypted port connection which is only limited to one. Very recent stuff, and rather involved and expensive.

There are other "solutions" which can block some forms of illegal connection access when NAT isn't used, much of which depends either your existing device infrastructure capabilites and/or new additional devices.


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