netcat Alternatives

Wireshark is a network protocol analyzer for Unix and Windows. It lets you capture and interactively browse the traffic running on a computer network.

Open Source

tcpdump is a common packet analyzer that runs under the command line.

Open Source

Ensure healthy website performance, uptime, and free from vulnerabilities. Automatic checks for SSL Certificates, domains and monitor issues with your websites all from one console and get instant notifications on any issues.

Try for free freemium $9.0 / Monthly (Lite plan)

socat is a relay for bidirectional data transfer between two independent data channels.

Ettercap is a suite for man in the middle attacks on LAN.

SmartSniff is a packet sniffer that capture TCP/IP packets and display them as sequence of conversations between clients and servers.

Do you need to map a specific TCP or UDP port on your machine to another port on another machine?

Free open source tool to perform TCP based session relay

Simple Port Forwarding works with WebPages and not directly with your router.

Packet Sender can send and receive UDP, TCP, and SSL on the ports of your choosing.

NetworkMiner is a Network Forensic Analysis Tool (NFAT) for Windows.

Portfwd, Port Forwarding Daemon, stands for port forwarding daemon.

Ethereal® is used by network professionals around the world for troubleshooting, analysis...

pwncat - netcat on steroids with Firewall, IDS/IPS evasion, bind and reverse shell, self-injecting shell and port forwarding magic - and its fully scriptable with Python (PSE)