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2026-09-22
Standard tools like proxychains often fail when it comes to multithreaded applications, Go/Rust binaries, Electron apps and system services. Enter tun2socks — a tool that creates a virtual TUN network interface, …
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A few days ago I investigated a production server compromise. Not a theoretical one — a real one, with a Monero miner, a C2 agent and a backdoor. The attack was completely automated. No one was specifically hunting that …
Read more2026-09-22
When working with real projects (changing a CDN, migration, refactoring) you often need to replace one URL with another in bulk. At first glance the task seems trivial: sed -i 's|old|new|g' **/* — and you’re done. …
Read more2026-09-22
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
The guide shows how to configure two Linux servers so that all internet traffic from a specific local subnet (for example, 10.100.10.0/24) goes not via its usual gateway but through an IPIP tunnel to a remote server that …
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
Introduction If you’re a beginner system administrator or developer, you’ve likely faced the task of managing network traffic. One of the powerful tools for this is HAProxy, a high-performance load balancer …
Read more2026-09-22
Introduction Netplan is a utility for declarative network configuration on Linux (Ubuntu, Debian and derivatives). It’s usually used for simple cases like Ethernet or Wi-Fi, but it can do much more: tunnel …
Read more2026-09-22
In the world of Linux and networking technologies, there are many subtle but critically important kernel settings. One such setting is rp_filter. This parameter, often overlooked, plays a key role in network security and …
Read more2026-09-22
Cloudflare Tunnel — a Cloudflare service that publishes a web server running at your home or office to the Internet without a public IP address and without port forwarding on the router. A utility called cloudflared is …
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