generated: '2026-07-27'
method: probed
source: live DNS/TLS/HTTP probes of apis.yml + OpenAPI hosts
hosts:
- host: www.nerc.com
  https: true
  tls_version: TLSv1.3
  cert_expires: Sep 25 22:28:40 2026 GMT
  hsts: true
  hsts_max_age: 15552000
- host: eroportal.nerc.net
  https: true
  tls_version: TLSv1.3
  cert_expires: Sep 16 03:37:32 2026 GMT
  hsts: true
  hsts_max_age: 3153600
- host: www.eisac.com
  https: true
  tls_version: TLSv1.3
  cert_expires: Mar 14 23:59:59 2027 GMT
  hsts: true
  hsts_max_age: 63072000
domains:
- domain: nerc.com
  dnssec: false
  caa:
  - 0 issue "certainly.com"
  - 0 issue "comodoca.com"
  - 0 issue "digicert.com; cansignhttpexchanges=yes"
  - 0 issue "letsencrypt.org"
  - 0 issue "pki.goog; cansignhttpexchanges=yes"
  - 0 issue "ssl.com"
  spf: true
  dmarc: true
  dmarc_policy: quarantine
- domain: nerc.net
  dnssec: false
  caa:
  - 0 issuewild "letsencrypt.org"
  - 0 issuewild "pki.goog; cansignhttpexchanges=yes"
  - 0 issuewild "ssl.com"
  - 0 issue "comodoca.com"
  - 0 issue "digicert.com; cansignhttpexchanges=yes"
  - 0 issue "letsencrypt.org"
  spf: true
  dmarc: true
  dmarc_policy: none
- domain: eisac.com
  dnssec: false
  caa:
  - 0 issue "comodoca.com"
  - 0 issue "digicert.com; cansignhttpexchanges=yes"
  - 0 issue "letsencrypt.org"
  - 0 issue "pki.goog; cansignhttpexchanges=yes"
  - 0 issue "ssl.com"
  - 0 issuewild "comodoca.com"
  - 0 issuewild "digicert.com; cansignhttpexchanges=yes"
  - 0 issuewild "letsencrypt.org"
  - 0 issuewild "pki.goog; cansignhttpexchanges=yes"
  - 0 issuewild "ssl.com"
  spf: true
  dmarc: true
  dmarc_policy: quarantine
  note: >-
    E-ISAC domain, added by hand on 2026-07-27 (the automated probe walks the
    apis.yml + OpenAPI hosts and had captured the www.eisac.com host but not the
    registrable domain). SPF includes _spf.salesforce.com, cust-spf.exacttarget.com,
    mmsend.com and spf.protection.outlook.com with -all; DMARC p=quarantine
    pct=100 with rua/ruf reporting.
findings:
  dnssec: Not enabled on nerc.com, nerc.net or eisac.com.
  hsts: Enabled on all three probed hosts; www.eisac.com carries the longest max-age
    (63072000, two years).
  caa: All three domains publish CAA issue records, constraining certificate issuance.
  email: SPF and DMARC published on all three domains; nerc.com and eisac.com enforce
    p=quarantine, nerc.net is p=none (monitor only).