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Unfortunately, as in ARP, these exchanges are completely unsecured. There are no countermeasures in place to prevent an attacker from generating a neighbor advertisement advertising his own layer two address as belonging to other hosts on the link
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you need to update the IP with OpenDNS. They have a lot of clients out there to do it, but as far as I found there were no linux clients. So I created a short linux script to do just that.
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I managed to get it all together and set up SMS notification from Nagios alerts via twitter.
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Run detached in -daemon mode, and make your own Twitter bot!
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Jabber::Bot makes it simple to create and command your own Jabber bot with little fuss.
links for 2009-02-09