# droe/sslsplit

Transparent SSL/TLS interception

Repository: https://github.com/droe/sslsplit
Canonical: https://ross.abutalabs.com/products/sslsplit
Homepage: https://www.roe.ch/SSLsplit
Language: C
License: BSD-2-Clause
License Family: permissive
Topics: sslsplit, tls, ssl, tls-interception, transparent-proxy, sni, starttls, https, http, nat, c
Last push: 2025-10-27T11:48:33+00:00

## Health v2 (maintenance only)
Score: 54/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 49, release rhythm 35, longevity 100
- inputs: {"age_days": 5263, "days_push": 310, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1876, forks 331 (observed 2026-08-28T04:05:47.793479+00:00)

## What it is
SSLsplit is a transparent SSL/TLS interception proxy for man-in-the-middle attacks against encrypted network connections. It terminates TLS connections redirected via NAT, forges certificates on the fly, and logs decrypted traffic to files, PCAPs, or a network interface.

## Use cases
- intercept and inspect HTTPS traffic on a network for forensics
- perform man-in-the-middle TLS attacks during penetration testing
- analyze application security by decrypting TLS connections
- log decrypted traffic to PCAP files for later analysis
- intercept SMTP STARTTLS and other plaintext-to-TLS upgrades
- mirror decrypted traffic to a network interface for monitoring tools

## When to choose
- you need transparent TLS interception without configuring client proxies
- you want on-the-fly forged certificates with SNI support
- you need IPv4/IPv6 support for TCP, SSL, HTTP, and HTTPS interception
- you require defenses against HSTS, HPKP, and Certificate Transparency during testing

## When to avoid
- you need a browser-configurable HTTP or SOCKS proxy
- you want to intercept modern TLS 1.3 or QUIC/HTTP2 connections
- you lack the ability to install a trusted CA certificate on target devices
- you need a pure passive traffic sniffer without interception

## Facets
- artifact type: cli-tool
- maturity: maintenance
- function: proxy, networking, security, penetration-testing, logging
- domain: security, networking, penetration-testing, privacy
- platform: bsd, cli, c
- tags: tls-interception, mitm, transparent-proxy, ssl, tls, sni, starttls, network-forensics, pcap-logging, linux, macos

## Member repositories
- droe/sslsplit (main) score 54

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:47.793479+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T03:14:43.884676+00:00, confidence not recorded.
  - readme: https://github.com/droe/sslsplit (fetched 2026-08-28T04:05:47.793479+00:00, sha 8b3d3fd8fbab)
  - homepage: https://www.roe.ch/SSLsplit (fetched 2026-08-29T10:53:31.203557+00:00, sha 0064554974dc)
- Data as of 2026-08-30T08:39:29.467469+00:00.