Fast.com is a simple internet speed testing tool. It estimates a user's download speed in seconds, with support for dozens of languages. The tool also offers optional metrics including upload speed, loaded and unloaded latency, and configurable parallel connection and test duration settings for more detailed network performance checks.
CanYouSeeMe.org is a free open port check tool for remotely verifying whether a port is open or closed. It is used to check port forwarding, confirm a server is running, or detect whether a firewall or ISP is blocking ports.
Packet Sender is a free, open source utility for sending and receiving network packets, with support for TCP, UDP, SSL and DTLS. It includes a built-in HTTP client for GET/POST requests, panel generation, a command line interface for scripting, and runs on Windows, Mac and Linux.
Meshtastic is an open source, community-driven project that uses LoRa radios as an off-grid communication platform in areas without reliable communications infrastructure. Devices rebroadcast messages to form a mesh network without cell towers, WiFi or internet, and can be paired with a phone or computer via Bluetooth, WiFi or USB. Clients include Apple and Android apps, a web client and a Python CLI/SDK.
NETworkManager is a free, open-source tool for managing networks and troubleshooting network problems. It includes 28 built-in tools such as an IP scanner, port scanner, ping monitor, DNS lookup, remote desktop and PowerShell in a single interface. It offers profiles for organizing hosts, and no license, subscription or telemetry.
PortChecker is a free online tool for checking whether the ports of an internet-connected device are open or closed. It can also ping a remote server and test port forwarding settings. The tool attempts a TCP connection and reports success or a port open signal. Checking requires the computer to be reachable via a public IP address or have a port forwarded.
Wireshark is a free and open-source network protocol analyzer that lets users capture and interactively browse the traffic running on a computer network, providing deep inspection of hundreds of protocols. It runs on most computing platforms including Windows, macOS, Linux, and UNIX, and can also be built from source on other platforms.
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CanYouSeeMe.org is a free open port check tool for remotely verifying whether a port is open or closed. It is used to check port forwarding, confirm a server is running, or detect whether a firewall or ISP is blocking ports.
Packet Sender is a free, open source utility for sending and receiving network packets, with support for TCP, UDP, SSL and DTLS. It includes a built-in HTTP client for GET/POST requests, panel generation, a command line interface for scripting, and runs on Windows, Mac and Linux.
Meshtastic is an open source, community-driven project that uses LoRa radios as an off-grid communication platform in areas without reliable communications infrastructure. Devices rebroadcast messages to form a mesh network without cell towers, WiFi or internet, and can be paired with a phone or computer via Bluetooth, WiFi or USB. Clients include Apple and Android apps, a web client and a Python CLI/SDK.
NETworkManager is a free, open-source tool for managing networks and troubleshooting network problems. It includes 28 built-in tools such as an IP scanner, port scanner, ping monitor, DNS lookup, remote desktop and PowerShell in a single interface. It offers profiles for organizing hosts, and no license, subscription or telemetry.
PortChecker is a free online tool for checking whether the ports of an internet-connected device are open or closed. It can also ping a remote server and test port forwarding settings. The tool attempts a TCP connection and reports success or a port open signal. Checking requires the computer to be reachable via a public IP address or have a port forwarded.
Wireshark is a free and open-source network protocol analyzer that lets users capture and interactively browse the traffic running on a computer network, providing deep inspection of hundreds of protocols. It runs on most computing platforms including Windows, macOS, Linux, and UNIX, and can also be built from source on other platforms.
