Home » All CA/Browser Forum Posts » Guidance on the Deprecation of Internal Server Names and Reserved IP Addresses

Guidance on the Deprecation of Internal Server Names and Reserved IP Addresses

This document explains the changes to Certification Authority support for internal server names and reserved IP dddresses and the reasons behind the new rules that were introduced in the Baseline Requirements for the Issuance and Management of Publicly Trusted Certificates, Version 1.0 that took effect effect on July 1, 2012: Guidance on the Deprecation of Internal Server Names and Reserved IP Addresses

Latest releases

Server Certificate Requirements
SC-081v3: Introduce Schedule of Reducing Validity and Data Reuse Periods - May 21, 2025

BR v2.1.5

Code Signing Requirements
v3.8 - Aug 5, 2024

What’s Changed CSC-25: Import EV Guidelines to CS Baseline Requirements by @dzacharo in https://github.com/cabforum/code-signing/pull/38 Full Changelog: https://github.com/cabforum/code-signing/compare/v3.7...v3.8

S/MIME Requirements
v1.0.10 - Ballot SMC012 - Jul 2, 2025

Introduces a new method for validation of mailbox control, using ACME for S/MIME as defined in RFC 8823: Extensions to Automatic Certificate Management Environment for End-User S/MIME Certificates.

Network and Certificate System Security Requirements
Version 2.0.5 (Ballot NS-008) - Jul 9, 2025