Packet Sender

Packet Sender
	Packet Sender GUI
Original author(s)	Dan Nagle
Stable release	v8.3.5 / March 19, 2023; 2 years ago
Written in	C++
Operating system	Cross-platform
Type	Packet generator
License	GPL v2
Website	packetsender.com

Packet Sender is an open source utility to allow sending and receiving TCP and UDP packets. It also supports TCP connections using SSL, intense traffic generation, HTTP(S) GET/POST requests, and panel generation. It is available for Windows, Mac, and Linux. It is licensed GNU General Public License v2 and is free software.^[1] Packet Sender's web site says "It's designed to be very easy to use while still providing enough features for power users to do what they need.".^[2]

Uses

Typical applications of Packet Sender include:

Troubleshooting network devices that use network servers (send a packet and then analyze the response)
Troubleshooting network devices that use network clients (devices that "phone home" via UDP, TCP, or SSL—Packet Sender can capture these requests)
Testing and development of new network protocols (send a packet, see if device behaves appropriately)
Reverse-engineering network protocols for security analysis (such as malware)
Troubleshooting secure connections (using the SSL server and client).
Automation (via Packet Sender's command line interface or resend feature)
Stress-testing a device (using intense network generator tool)
Sharing/Saving/Collaboration using the Packet Sender Cloud service

Packet Sender comes with a built-in TCP, UDP, and SSL server on multiple ports a user specifies. This remains running listening for packets while sending other packets.

Features

As of version v8.1.1 Packet Sender supports the following features:^[3]

Live traffic log (Time / From IP / From Port / To IP / Method / Error / ASCII / HEX)
Persistent TCP and SSL Connections
HTTP Requests with Auth headers
Portable Mode
IPv6 Client / Server
IPv4 Subnet Calculator
Saved packets (with sending directly from saved list)
Mixed ASCII packet notation (ASCII with embedded syntax to allow hex)
Multiple TCP servers
Multiple UDP servers
Multiple SSL servers
Multicast send and receive
Packet resending at n intervals (where n is seconds)
Multi-threaded TCP/SSL connections
Command-line interface
Packet responses
Smart Packet responses
Macros inside packet responses for TIME, DATE, UNIXTIME, RANDOM, UNIQUE
Packet search (for saved packets)
Packet export/import
Intense Traffic Generator (UDP Flooding) via GUI or CLI
Quick-send from traffic log
Save traffic log
Panel Generation for scripting buttons
Packet Sender Cloud