The NetScanTools Pro Packet Generator tool allows you to craft or build a TCP, UDP, ICMP, CDP (Cisco® Discovery Protocol), ARP/RARP or RAW packet and send one or more packets to a target IPv4 address.
You have full control over the headers: ethernet source and destination MAC addresses, IP, TCP, UDP or ICMP header fields. You can send different types of packets in succession using scripting. You can also play back a previously saved packet capture file.
Related Tool Links
These pages explore the modes of Packet Generation: