iPhones fill Duke University's Wi-Fi network with requests: Duke discovered that an iPhone is an effective denial of service attack against their Cisco access points. An assistant IT director reports to Network World that iPhones can generate spurious ARP (address resolution protocol) requests--up to 18,000 per second, effectively shutting down 12 to 30 APs at a time! ARP is used to obtain the unique media access control (MAC) layer address for an adapter when a device has the IP address. It's used on local networks to address Ethernet frames properly. There's no good reason for ARP to churn. In this case, the ARP request is for a non-existent IP address on the local network; Duke's Kevin Miller speculates that the iPhone improperly caches the gateway IP address at a home network and then attempts to perform ARP on that address on Duke's network.
From the lovely idea department, free Wi-Fi in honor of a late parent: Jonathan Plesset must love his father, who died eight years ago, because he's carried out what I believe is a unique idea in honor of R. Jeffrey Plesset: a free Wi-Fi network in his memory. The younger Plesset and his uncle operate Shadyside Inn Suites in Pittsburgh, and the Wireless Shadyside network spans several blocks in that neighborhood. They've seen 1,000 users before they even announced availability. They're using Meraki mesh equipment backed by two high-speed DSL lines, with nearly 10 Mbps of downstream bandwidth.