Screencast for Ostinato packet/traffic generator (http://ostinato.org/). Ostinato is an open-source, cross-platform (Windows, Linux, BSD, Mac OSX) packet crafter/traffic generator. It aims to be "Wireshark in Reverse" and thus become complementary to Wireshark. It features custom packet crafting with editing of any field for several protocols: Ethernet, 802.3, LLC SNAP, VLAN (with Q-in-Q), ARP, IPv4, IPv6, IP-in-IP a.k.a IP Tunneling, TCP, UDP, ICMPv4, ICMPv6, HTTP, SIP, RTSP, NNTP, etc. It is useful for both functional, performance and penetration testing.