Packet Sender has built-in servers for UDP and TCP to receive unsolicited packets on the ports of your choosing. Beyond just normal UDP and TCP, Packet Sender's fully multi-threaded client supports any number of persistent TCP and SSL (TLS) connections.
Packet Sender was designed to be very easy to use while still providing enough features for power users.
Using its command line tool or hotkeys
Using the built-in TCP, UDP, SSL clients
using the built-in UDP and TCP servers
by having 2 Packet Senders talk to each other
by sending customers a portable Packet Sender with pre-defined settings and packets
Send SSL and then analyze the traffic log.