netcat

Netcat is a featured networking utility which reads and writes data across network connections…

21 Alternatives To netcat

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Cocoa Packet Analyzer

Native Cocoa app for capturing and analyzing packets.

Ethereal

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

Intercepter-NG

Intercepter-NG is a multifunctional network toolkit for various types of IT specialists.

LANBench

LANBench is a simple LAN / TCP Network benchmark utility.
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LANGuardian

NetFort LANGuardian is a network visibility solution which uses deep packet inspection to monitor, troubleshoot, and report on user & network activity.

NetworkMiner

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

Nmap

Nmap Free Security Scanner, Port Scanner, & Network Exploration Tool. Download open source software for Linux, Windows, UNIX, FreeBSD, etc.

Packetyzer

Packetyzer provides a Windows user interface for the Ethereal packet capture and dissection library.
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Wireshark

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