frp

frp is an open-source reverse proxy that makes a server sitting behind a NAT or firewall reachable from the internet. It supports TCP and UDP traffic as well as HTTP and HTTPS, so requests can be forwarded to internal services using a domain name. It also offers a peer-to-peer connect mode. The project is written in Go and licensed under Apache-2.0.

Typical setups include reaching a computer on a home or office LAN over SSH, sharing one port between several SSH services, serving internal web apps on custom domains, forwarding DNS queries and Unix domain sockets, exposing a simple HTTP file server, enabling HTTPS for a local service, and exposing a service privately. Configuration is handled through files, with support for environment variables and splitting settings across several files.

Operations features include a server dashboard, a client admin UI, dynamic proxy management, Prometheus monitoring and client authentication. A server component runs on a machine with a public address, and a client runs beside your internal service. It suits developers, homelab users and small teams who want to host their own tunnel instead of using a commercial tunneling service.