3proxy

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Score6.8

Rank#4 of 36

PriceFree

Free planYes

Runs onLinux, macOS, Self-hosted, Windows

Summary

3proxy is a free proxy server for managing access between internal users and external resources, or between external users and internal resources. It supports HTTP and HTTPS proxying, SOCKS v4, v4.5 and v5, and FTP over HTTP. Additional services include POP3 proxying, TCP and UDP port mapping, and a caching DNS proxy. Administrators can apply access controls, bandwidth and traffic limits, proxy chaining, and log rotation. Logs can be written to files, Unix syslog, or an ODBC database, with configurable formats. Builds using OpenSSL include TLS options such as HTTPS proxy connections, authenticated upstream TLS, and mutual TLS. Security recommendations call for restricting access with ACLs; the documented strong authentication method currently uses cleartext authentication. 3proxy runs on Linux, macOS, Windows, and self-hosted environments. Docker images are provided, and Windows system-service installation is described. Release binaries have SHA256 checksums, an OpenPGP signature, and build provenance attestation; Docker images are signed and attested. Optional build support includes OpenSSL, PCRE2, PAM, and ODBC. The listed plan is 0.00 USD per free.

Who it is for

3proxy suits administrators who need a configurable proxy service across different protocols and operating systems. It may be relevant where access controls, traffic limits, or selectable logging destinations are needed.

What is good

Supports HTTP, HTTPS, SOCKS, and FTP proxying.
Includes TCP and UDP port mapping.
Offers bandwidth and traffic amount limits.
Available for Linux, macOS, and Windows.
Listed at 0.00 USD per free.

What to know first

Documented strong authentication uses cleartext.
TLS features require an OpenSSL build.
Security guidance advises restricting access with ACLs.

Verdict

3proxy covers a broad set of proxy protocols and administrative controls, with free availability and several deployment options. Review its ACL guidance and cleartext authentication caveat before choosing a configuration.

3proxy plans and pricing

All plans

3proxy Free Freeware · open source 3proxy.org · 3 Oct 2026

Compared on proxy software

Free plan: Yes3proxy.org

Facts

Purpose: 3proxy is a small proxy server for providing controlled access between internal users and external resources, or between external users and internal resources.3proxy.org · 3 Oct 2026
Proxy protocols: It supports HTTP and HTTPS proxying, SOCKS v4, v4.5 and v5, and FTP over HTTP.3proxy.org · 3 Oct 2026
Other services: The service set includes POP3 proxying, TCP and UDP port mapping, and a caching DNS proxy.3proxy.org · 3 Oct 2026
Access controls: The combined program supports access control, bandwidth limits, traffic amount limits, proxy chaining and log rotation.3proxy.org · 3 Oct 2026
Logging: Logging can use files, syslog on Unix, or an ODBC database, with a configurable format.3proxy.org · 3 Oct 2026
TLS: When compiled with OpenSSL, built-in TLS features include HTTPS proxy connections, upstream TLS connections with certificate authentication, and mutual TLS.3proxy.org · 3 Oct 2026
Security guidance: The security recommendations advise restricting access with ACLs and warn that the documented strong authentication method currently uses cleartext authentication.3proxy.org · 3 Oct 2026
Release integrity: The site says release binaries are published with SHA256 checksums, an OpenPGP signature and a GitHub build provenance attestation; Docker images are signed and attested.3proxy.org · 3 Oct 2026
Integrations: The documentation lists optional build support for OpenSSL, PCRE2, PAM and ODBC.3proxy.org · 3 Oct 2026
Deployment: The site provides Docker images and describes installing 3proxy as a Windows system service.3proxy.org · 3 Oct 2026
Commercial support: The site directs licensing or commercial support questions to an email address.3proxy.org · 3 Oct 2026