# samyk/slipstream

NAT Slipstreaming allows an attacker to remotely access any TCP/UDP services bound to a victim machine, bypassing the victim’s NAT/firewall, just by anyone on the victim's network visiting a website

Repository: https://github.com/samyk/slipstream
Canonical: https://ross.abutalabs.com/products/slipstream
Homepage: https://samy.pl/slipstream/
Language: Perl
License Family: other
Last push: 2023-01-14T21:39:03+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 2132, "days_push": 1327, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1984, forks 214 (observed 2026-08-28T04:06:02.040662+00:00)

## What it is
NAT Slipstreaming is a security research tool by Samy Kamkar that demonstrates remotely opening arbitrary firewall pinholes through a victim's NAT by exploiting browser behavior and Application Level Gateway (ALG) connection tracking. It chains timing attacks, WebRTC IP extraction, packet fragmentation control, and protocol confusion to bypass NAT/firewall port restrictions.

## Use cases
- test whether a NAT router is vulnerable to slipstreaming attacks
- demonstrate firewall pinhole bypass via browser exploitation
- research ALG connection tracking vulnerabilities in routers
- verify NAT/firewall protections against protocol confusion attacks
- study packet fragmentation and MTU manipulation techniques
- audit network perimeter security against browser-driven NAT attacks

## When to choose
- you are a security researcher studying NAT/ALG vulnerabilities
- you need to test router or firewall resilience to pinhole attacks
- you want a reference implementation of the NAT Slipstreaming attack chain

## When to avoid
- you need a general-purpose penetration testing suite
- you want a supported tool with a license or active maintenance
- you are looking for defensive firewall configuration tooling rather than an exploit demo

## Facets
- artifact type: cli-tool
- maturity: maintenance
- function: security, networking, penetration-testing
- domain: security, networking, penetration-testing
- platform: cli
- tags: nat-slipstreaming, firewall-bypass, nat-pinhole, alg-exploit, attack-research, proof-of-concept, perl, linux, macos

## Member repositories
- samyk/slipstream (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:06:02.040662+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 2026-08-30T03:03:20.334181+00:00, confidence not recorded.
  - readme: https://github.com/samyk/slipstream (fetched 2026-08-28T04:06:02.040662+00:00, sha 126b860faef7)
  - homepage: https://samy.pl/slipstream/ (fetched 2026-08-29T10:43:06.609460+00:00, sha 048e948d6c51)
- Data as of 2026-08-30T08:39:29.467469+00:00.