Linux Lacks Proxifier: How to Proxy Select Traffic Securely

The article discusses methods for selective HTTP proxying in Linux environments. It highlights the absence of a Linux equivalent to the Proxifier tool available on other operating systems like Windows, macOS, and Android. Key techniques for configuring proxies include using environment variables (http_proxy and https_proxy) for specific processes, utilizing iptables to redirect traffic for specific users, and employing network namespaces to create separate routing tables.

Each method has its advantages, with network namespaces offering greater versatility, while iptables provide a simpler approach. The content is authored by Johannes Ullrich, Ph.D., detailed on May 21, 2026.