Insights, updates and background on DNS, TLS and infrastructure trust
Most teams don't know exactly which domains they own, where they're registered, and what points where. That's not a security problem – it's an organization problem. Until it isn't.
You're starting a new project, registering a domain, and want to do it right from the beginning. Here's a pragmatic checklist for a clean DNS configuration – no paranoia, just common sense.
SPF, DKIM, and DMARC protect your domain from mail spoofing. But they're only as strong as the DNS records they're defined in. Change a record, break the chain of trust.
TLS certificates expire. Automatic renewal can fail. And an unnoticed certificate issuance can mean someone else controls your domain.
The CAA record defines which certificate authorities may issue TLS certificates for your domain. Without it, anyone can. If it's manipulated, you lose control over your encryption.
The MX record determines which server receives your emails. If it's manipulated, password resets, contracts, and 2FA codes end up with the attacker.
The NS record determines which nameservers are authoritative for your domain. If it's manipulated, an attacker can freely define every other record – without you noticing.
We invest in firewalls, MFA, and encryption. But DNS and TLS – the foundation everything stands on – we often only monitor by accident.