IP Address and Subnetting

Network Classes 0 – Gateway Class A 1-126 CIDR /8 Private:10.0.0.0 – 10.255.255.255 /8 127 – loopback Class B 128-191 CIDR /16 Private:172.16.0.0 – 172.31.255.255

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Buffalo router local loopback comman

http://support.hornington.com/kb/question.php?ID=704 iptables -t nat -A POSTROUTING -s 192.168.11.0/255.255.255.0 -d 192.168.11.0/255.255.255.0 -o br0 -j MASQUERADE Where 192.168.11.0 change to your local LAN subnet

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MAC OSX command line Port Scan

Stroke sudo ln /Applications/Utilities/Network Utility.app/Contents/Resources/stroke /usr/bin/stroke chmod uo+x /usr/bin/stroke How to use Stroke stroke address startPort endPort

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Google Public DNS

Google Public DNS As web pages become more complex and include more resources from multiple origin domains, clients need to perform multiple DNS lookups to

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