Security Portal: Ask Buffy - identifying an IP address, connecting a Linux machine to the Internet and more

"How can I identify a machine on the network just by its IP address? I tried a NS lookup, but that doesn't resolve to anything. Someone grabbed this IP address from our DHCP pool. I just want to find out what machine took this IP address. Are there any utilities out there that can accomplish this?..."

"Is it possible to connect a Linux machine to the Net via proxy server? If so, how? This is the only way I can bypass the firewall...."

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