• Reduced memory usage from 44 bytes per target to 28 bytes. This reduces the memory usage for a Class-B network from 2.75MB to 1.75MB, and a Class-A network from 704MB to 448MB.
• Reduced the startup time for large target ranges. This reduces the startup time for a Class-A network from 80 seconds to 15 seconds on a Compaq laptop with 1.4GHz CPU.
• Added support for FreeBSD, OpenBSD, NetBSD and MacOS X (Darwin). arp-scan will probably also work on other operating systems that implement BPF, but only those listed have been tested.
• Improved operation of the --srcaddr option. Now this will change the source hardware address in the Ethernet header without changing the interface address.
• Additional fingerprints for arp-fingerprint.
• Improved manual pages.
• Updated IEEE OUI and IAB files. There are now 9,426 OUI entries and 1,568 IAB entries.