Porch by denyfirst icon
Porch by denyfirst icon

Porch by denyfirst

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Self-hosted checks of what your servers show the outside world: TLS, website, mail and DNS, graded against published standards.

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  • New

Updated

  • Updated Oct 2026

Platforms

  • Windows
  • Mac
  • Linux  porch-scan command line, signed binaries.
  • Self-Hosted  Docker Compose. The image is pinned by digest; releases are signed.
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What is Porch by denyfirst?

Porch checks what a server shows the outside world and grades it against published standards: TLS versions, ciphers and the certificate; HTTPS redirects, HSTS, cookies and headers; SPF, DKIM, DMARC, MTA-STS and the mail servers; name servers, DNSSEC and zone transfers. It also lists the names under a domain from certificate logs and DNS.

Every finding links the RFC or guideline it rests on, and every report says what it could not measure. It runs on your own server, with Docker, or as a command line tool for Linux, macOS and Windows. A copy checks a domain only after that domain publishes a TXT record proving control.

No account, no telemetry, no log of who checked what. Go's standard library only. Releases are signed and can be rebuilt byte for byte. Open source under AGPL-3.0. A live demo runs against the maker's own domain.