Bit-Twist
Introduction '''Bit-Twist''' is a libpcap-based packet generator and packet capture file modifier and replayer. It complements tcpdump, a packet capturing tool also built upon the packet capturing engine libpcap. Bit-Twist allows you to regenerate packets from one or more pcap files. It also comes with a comprehensive pcap file editor to allow advance manipulation of packet information, e.g. fields in Ethernet, ARP, IP, ICMP, TCP, and UDP headers,  prior to regenerating the packets onto the network.Bit-Twist is commonly used to simulate network traffic to test firewall rules, IDS, and IPS. Bit-Twist runs on FreeBSD, NetBSD, OpenBSD, macOS, Linux, and Microsoft Windows.
External links * Bit-Twist official website