Capability
DNS monitoring: catching the day a record quietly drifted from its expected value.
A DNS record that silently drifts to a wrong value costs the day visitors notice: email stops flowing, the storefront redirects to the wrong origin, the CDN serves from a region you did not authorize. DNS monitoring is the five-minute probe that names the record, the previous value, and the new value.
- Probes A, AAAA, CNAME, MX, and TXT records every five minutes.
- Email cadence the moment a record drifts from its expected value.
- Names the record type, the previous value, the new value in every alert.
- Catches the DNS-provider-side drift that your dashboard does not show.
- No DNS-provider hookup. The probe runs from the outside over public DNS.
How it works
Setup, in three beats.
Step 01
Add the domain and the record types you care about
Paste your domain (example.com) and choose the record types you want watched: A, AAAA, CNAME, MX, TXT, or any combination. SiteGuardian queries public DNS for each one and stores the expected value. The next probe starts the same minute.
Step 02
Let the five-minute probe find the silent drift
Most DNS drift happens quietly: a registrar UI typo, a CDN endpoint change pushed without telling the team, an MX record update that the previous host stopped answering. The five-minute cadence catches the drift before any visitor reports it, with the record type, the previous value, and the new value.
Step 03
Catch the drift before the storefront redirects to the wrong origin
A DNS A record that quietly drifts to a wrong IP costs the next visitor who lands on the wrong origin. SiteGuardian probes the record from outside the public DNS and fires the alert the same five-minute cycle, so the fix lands before the cart abandonment metric does.
What the alert actually says
One email. One URL. One timestamp.
Your A record for example.com drifted at 14:32 UTC. Previous value: 203.0.113.10. New value: 198.51.100.42. The drift started at 14:27 UTC. Confirm the change is intentional; if not, revert within the next probe window.Frequently asked
The dns monitoring questions, answered flat.
Frequently asked
Related reading
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Starter is $19 a month — one site, ten URLs, every-five-minute checks. Pro is $39 a month — three sites, fifty URLs, every-minute checks. Lifetime is $299 paid once and stays yours with every future update included.
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