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2026-09-22
Netcat (nc) reads and writes data over TCP and UDP connections. With one small utility it’s convenient to check a port, grab a service banner, transfer a file between machines, or create a temporary tunnel. Below — …
Read more2026-09-22
curl — a command-line utility for transferring data via URLs. It sends a request to a server and shows the response: an HTML page, JSON from an API, headers, or a file. The name stands for Client URL. Besides HTTP and …
Read more2026-09-22
Link to check how the installed Telemt works Update: September 2026 Before deploying the official image, note its status: The image is hardly updated. The tag telegrammessenger/proxy:latest (aka 1.4) was last published …
Read more2026-09-22
Project status as of September 2026. VPNCloud is written in Rust. The last release is 2.3.0 from December 23, 2021, the most recent changes in the repository are from March 2024. The project is not archived, but is …
Read more2026-09-22
pfSense — a firewall and router on FreeBSD, one of the oldest open projects in this area. It is developed by Netgate, and today it exists in two editions: the open pfSense CE (Community Edition) and the commercial …
Read more2026-09-22
OPNsense — an open-source firewall and router. It is installed on a dedicated PC, mini-PC, or virtual machine and becomes the gateway between the office network and the Internet: it filters traffic, assigns addresses, …
Read more2026-09-22
A proxy for MySQL is a program between an application and database servers. The application connects to the proxy like a regular MySQL server, and the proxy decides which server to send a query to: writes — to the …
Read more2026-03-04
TTL (Time To Live) — is an eight-bit field in the IP header that defines the maximum number of “hops” (nodes) a packet can traverse before being discarded. Each time it passes through any router the TTL value …
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