# Tcpreplay Tcpreplay is a Penetration Testing product. It runs on-premises. Pricing is free. Tcpreplay is a network traffic editing and replay tool used for testing network devices and applications. Checked October 2026. ## What is Tcpreplay? Tcpreplay is a suite of GPLv3 licensed utilities for UNIX (and Win32 under Cygwin) operating systems for editing and replaying network traffic which was previously captured by tools like tcpdump and Wireshark. It allows you to classify traffic as client or server, rewrite Layer 2, 3 and 4 packets and finally replay the traffic back onto the network and through other devices such as switches, routers, firewalls, NIDS and IPS's. Tcpreplay supports both single and dual NIC modes for testing both sniffing and in-line devices. Tcpreplay is used by numerous firewall, IDS, IPS, NetFlow and other networking vendors, enterprises, universities, labs and open source projects. If your organization uses Tcpreplay, please let us know who you are and what you use it for so that I can continue to add features which are useful. Tcpreplay is designed to work with network hardware and normally does not penetrate deeper than Layer 2. Yazan Siam with sponsorship from Cisco developed tcpliveplay to replay TCP pcap files directly to servers. Use this utility if you want to test the entire network stack and into the application. As of version 4.0, Tcpreplay has been enhanced to address the compl Tags: Network Testing, Packet Capture ## Quick facts - Category: [Offensive Security](https://cybersectools.com/categories/offensive-security-testing) ยท [Penetration Testing](https://cybersectools.com/categories/pentesting-tools) - Deployment: On-Premises - Company size fit: SMB, Mid-Market, Enterprise - Pricing model: Free - GitHub stars: 1,308 - Website: github.com ## Tcpreplay FAQ ### What is Tcpreplay? Tcpreplay is a product in the Penetration Testing category. It covers Network Testing and Packet Capture. ### What is the pricing for Tcpreplay? Tcpreplay is free. Download and setup instructions are at https://github.com/appneta/tcpreplay/. ### What are alternatives to Tcpreplay? Alternatives to Tcpreplay listed on CybersecTools: 1. [Blindspot DDoS Resilience Testing](https://cybersectools.com/tools/blindspot-ddos-resilience-testing) - Managed DDoS resilience testing service with 100+ real-world attack vectors. (Commercial) 2. [FuzzingLabs Telecom 4G/VoLTE/5G Fuzzer](https://cybersectools.com/tools/fuzzinglabs-telecom-4gvolte5g-fuzzer) - Fuzz-testing tool for auditing 4G, VoLTE, and 5G telecom network elements and protocols (Commercial) 3. [SECWATCH Pietje Precies-Pentest](https://cybersectools.com/tools/secwatch-pietje-precies-pentest) - Manual penetration testing service by certified ethical hackers (Commercial) 4. [Tempest Pentest](https://cybersectools.com/tools/tempest-pentest) (Commercial) 5. [Managed Autonomous Pentesting (MAP)](https://cybersectools.com/tools/hackurity-art-stack) - Managed continuous autonomous pentesting using payload-less exploitation and attack paths (Commercial) Compare all Tcpreplay alternatives at [https://cybersectools.com/alternatives/tcpreplay-1](https://cybersectools.com/alternatives/tcpreplay-1) ### What deployment and organization size does Tcpreplay fit? Tcpreplay is available as on-premises software. It is listed for small businesses, mid-market companies and enterprises. It is free. ## Compare Tcpreplay with similar solutions - [Tcpreplay vs Blindspot DDoS Resilience Testing](https://cybersectools.com/compare/blindspot-ddos-resilience-testing-vs-tcpreplay-1) - [Tcpreplay vs FuzzingLabs Telecom 4G/VoLTE/5G Fuzzer](https://cybersectools.com/compare/fuzzinglabs-telecom-4gvolte5g-fuzzer-vs-tcpreplay-1) - [Tcpreplay vs SECWATCH Pietje Precies-Pentest](https://cybersectools.com/compare/secwatch-pietje-precies-pentest-vs-tcpreplay-1) All alternatives to Tcpreplay: [/alternatives/tcpreplay-1](https://cybersectools.com/alternatives/tcpreplay-1) --- Source: https://cybersectools.com/tools/tcpreplay-1 For AI agents: every CybersecTools shortlist is listed at https://cybersectools.com/shortlists.md, and any compare page has a Markdown copy too (add .md to its URL). More on Tcpreplay: funding, momentum, hiring and news, plus the full product and company record, are available through the Mandos MCP Server (paid plans), which connects to AI assistants: https://mandos.io/mcp?utm_source=cybersectools.com&utm_medium=product-md