generated: '2026-07-27'
method: probed
source: >-
  live DNS/TLS/HTTP probes of apis.yml + OpenAPI hosts (0-working/probe-domain-security.py),
  extended 2026-07-27 with manual TLS/HSTS probes of the three register hosts
hosts:
- host: www.ofgem.gov.uk
  https: true
  tls_version: TLSv1.3
  cert_expires: Oct  3 03:18:33 2026 GMT
  hsts: true
  hsts_max_age: 31557600
- host: epr.ofgem.gov.uk
  https: true
  tls_version: TLSv1.3
  tls_versions_supported: [TLSv1.3, TLSv1.2]
  cert_expires: Jan 20 23:59:59 2027 GMT
  hsts: false
  note: Electronic Public Register application. Probed manually 2026-07-27.
- host: epre-api.ofgem.gov.uk
  https: true
  tls_version: TLSv1.3
  tls_versions_supported: [TLSv1.3, TLSv1.2]
  cert_expires: Jan 20 23:59:59 2027 GMT
  hsts: false
  note: >-
    Electronic Public Register backend (Cognito sign-in plus the undocumented
    GraphQL endpoint). Probed manually 2026-07-27.
- host: rer.ofgem.gov.uk
  https: true
  tls_version: TLSv1.3
  tls_versions_supported: [TLSv1.3, TLSv1.2]
  cert_expires: Jan 10 23:59:59 2027 GMT
  hsts: false
  note: Renewable Electricity Register application. Probed manually 2026-07-27.
domains:
- domain: ofgem.gov.uk
  dnssec: false
  caa: []
  spf: true
  dmarc: true
  dmarc_policy: reject