Bulgaria Ordinance on Minimum Requirements for Network and Information Security (2019)
Chapter Two, Section II: protection (Articles 13 to 31) – Bulgaria Ordinance on Minimum Requirements for Network and Information Security (2019)

Bulgaria Ordinance on Minimum Requirements for Network and Information Security (2019) 25: Protect DNS: place multiple DNS servers in different networks, deploy DNSSEC, minimise queries per RFC 7816, forbid zone transfers, and publish DMARC and SPF records

What does 25 require?

Where the entity runs more than one DNS server, each sits in a different network or subnetwork. DNSSEC is applied to authenticate the entity's DNS data. Query minimisation under RFC 7816 is used. Zone transfers are prohibited, because they let attackers enumerate every host in a zone, pick targets and bypass network controls. The zone configuration includes a DMARC record and an SPF record for email authentication, as defined in the ordinance's additional provisions.

Maintained by Gerard Blokdyk

What else in your programme already covers this

This control maps to 1 controls across 1 other frameworks. If you already hold one of them, the evidence you collected for it is the starting point here rather than new work.

ISO 27002:2022 · 1 control

  • 8.21 Security of network services

Every mapping shown was judged rather than inferred from wording similarity, and the ones that failed review are published too. See the coverage reports and what was rejected.

Other controls in Chapter Two, Section II: protection (Articles 13 to 31) – Bulgaria Ordinance on Minimum Requirements for Network and Information Security (2019)

Query this from an agent

The graph holds this control, the 1 it maps to, and the evidence behind each claim, over MCP and REST.