tcpdump
tcpdump is a common packet analyzer that runs under the command line.
Some of the top features or benefits of tcpdump are: Powerful packet capturing, Wide compatibility, Filter flexibility, Command-line interface, and Free and open-source. You can visit the info page to learn more.
- Open Source
Best tcpdump Alternatives & Competitors in 2025
The best tcpdump alternatives based on verified products, community votes, reviews and other factors.
Filter:
12
Open-Source Alternatives.
Latest update:
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Wireshark is a network protocol analyzer for Unix and Windows. It lets you capture and interactively browse the traffic running on a computer network.
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Ettercap is a suite for man in the middle attacks on LAN.
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NinjaOne (Formerly NinjaRMM) provides remote monitoring and management software that combines powerful functionality with a fast, modern UI. Easily remediate IT issues, automate common tasks, and support end-users with powerful IT management tools.
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Netcat is a featured networking utility which reads and writes data across network connections...
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SmartSniff is a packet sniffer that capture TCP/IP packets and display them as sequence of conversations between clients and servers.
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NetworkMiner is a Network Forensic Analysis Tool (NFAT) for Windows.
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socat is a relay for bidirectional data transfer between two independent data channels.
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PCAPdroid is an android app to capture the phone traffic and analyze it remotely (e.g. via Wireshark). The traffic can be easily downloaded from a remote device thanks to the integrated HTTP server, or streamed to a remote UDP receiver.
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Packet Sender can send and receive UDP, TCP, and SSL on the ports of your choosing.
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Do you need to map a specific TCP or UDP port on your machine to another port on another machine?
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Simple Port Forwarding works with WebPages and not directly with your router.
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Free open source tool to perform TCP based session relay
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Fiddler is a debugging program for websites.
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TheCodingMonkeys, authors of software like SubEthaEdit.
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