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IIS Troubleshooting

Troubleshooting guides for Internet Information Services (IIS) in Nodinite environments.

HTTPS / TLS Hardening

How to perform hardening on your Nodinite installation — Configure HTTPS/TLS for Nodinite v7: enable TLS before installation or add it to an existing deployment
How to perform hardening on your Nodinite v6 installation — Same guide for Nodinite v6 environments
Development Certificates — Generate and trust self-signed TLS certificates for development and test environments
TLS Troubleshooting — Fix CRL/OCSP page load slowness and 401 Unauthorized loopback errors
HTTP Security Headers — HSTS, CSP, X-Content-Type-Options, Referrer-Policy, Permissions-Policy, Cache-Control via IIS web.config
Access Controls & Vendor Policy — Vendor zero-access architecture, application-level RBAC, network hardening recommendations, NDA and 3rd-party data policy
Key Management, Backup & Data Residency — NIST SP 800-57 key lifecycle, AES-256 backup encryption, GDPR regional compliance, DoD 5220.22-M media destruction

IIS Authentication settings — Configure Windows Authentication, Negotiate/Kerberos providers, and kernel-mode authentication in IIS
IIS Windows Features — Required Windows Server roles and IIS features for Nodinite to function correctly
NTLM vs Kerberos Authentication — Diagnose and fix 4–30 second response times caused by NTLM fallback and LSA SID lookup floods; includes diagnostic PowerShell script
- For HTTP SPN registration when the IIS app pool runs under a custom domain account, see SPN – IIS Application Pool

IIS URL Rewrite – Legacy v6 Redirect — Remove the server-level redirect rule left over from a v6 installation that silently redirects 4000-series ports to the old v6 HTTPS address

HTTP Error 405.0 - Method Not Allowed — Resolve 405 errors when PUT/DELETE verbs are blocked by WebDAV or IIS handler mappings