On Jan 16, 2012, at 11:52 AM, Tim Franklin wrote: >> As for the iOS problem, read on here: >> http://www.net.princeton.edu/apple-ios/ios41-allows-lease-to-expire-keeps-using-IP-address.html > > That's the iOS issue - out of curiosity, what's the Mac issue?
That's a poorly maintained device issue. The good news is the DHCP requests for those devices (if you log them) commonly include information about the device owner, e.g.: Jan 15 16:56:35 nat dhcpd[1046]: DHCPACK on 10.0.0.168 to 18:e7:f4:5c:b1:d7 (MATTS-IPOD-3) via eth0 or client-hostname "iPhone-Touch"; client-hostname "Her-iPod"; client-hostname "iPad"; client-hostname "Amys-iPod"; Also, citing a single software release with a defect can be done for any platform. http://support.microsoft.com/kb/928233 These issues are commonly solved by upgrading to the most recent release of software. Reading the princeton article says setting your lease time to 3600 seconds seems to workaround the problem from the network side. I'm personally not convinced of the value of very short lease times (less than an hour). Even IPv6 privacy addresses stay around longer than that. MacOS Kernel (11.2.0) net.inet6.ip6.temppltime: 86400 net.inet6.ip6.tempvltime: 604800 Linux Kernel (3.1.1) net.ipv6.conf.default.use_tempaddr = 0 net.ipv6.conf.default.temp_valid_lft = 604800 net.ipv6.conf.default.temp_prefered_lft = 86400 FreeBSD 9.0-RELEASE (GENERIC) net.inet6.ip6.use_tempaddr: 0 net.inet6.ip6.temppltime: 86400 net.inet6.ip6.tempvltime: 604800 - Jared
