What DNS is, in plain terms
DNS is the system that maps your domain name (like yourfirm.com) to the servers and services behind it. Every subdomain, mail server, web address, and online service your firm uses has DNS records that tell the internet where to find it.
Because DNS is the connective tissue of your public-facing footprint, its configuration matters for security — not just for whether things work, but for what your firm is inadvertently exposing.
Why accounting and tax firms should care
Accounting firms accumulate DNS records over time — a portal here, a document-sharing service there, a marketing microsite, an old mail provider. Each one is a potential entry point if it's forgotten or misconfigured.
A subdomain that still resolves to a service you no longer use can sometimes be claimed by someone else, allowing them to host content on what looks like your firm's domain. Stale records pointing at infrastructure outside your control are easy to overlook and worth reviewing.
What to review
Subdomains that resolve to services you no longer use or no longer control.
Records pointing at third-party infrastructure that may have been decommissioned.
Mail-related DNS records (MX, SPF, DKIM, DMARC) and whether they're consistent and current.
Whether DNS configuration matches the services your firm actually relies on today.
What a professional assessment adds
Reading about DNS is different from knowing whether your domain's records are clean. A forgotten subdomain or a stale record can sit unnoticed for years.
The RingWarden Professional Security Assessment reviews your DNS configuration using publicly available information, investigates and validates potential issues, and reports them in plain language with practical recommendations — without logging into your systems or accessing private client data.
This article is general information for accounting and tax professionals. It is not a security assessment, audit, guarantee of security, or compliance certification. For a professional review of your firm's public-facing digital infrastructure, consider the RingWarden Professional Security Assessment.