Synthetic Monitoring: The Guardian of Business Availability

A recent incident on November 18, 2025, highlighted the importance of Synthetic Monitoring in ensuring business availability. A minor database permission change by Vendor X triggered a chain reaction, leading to the intermittent paralysis of its global edge network for nearly 4 hours.

What is Synthetic Monitoring?

Synthetic Monitoring is an independent, user-centric mechanism for verifying business availability and identifying invisible network failures during vendor-side outages. It operates from the perspective of real users, actively validating the actual accessibility and performance of services.

By using a distributed probing network across Internet service providers (ISPs), regions, and vendors, Synthetic Monitoring creates an independent verification layer that is decoupled from any single infrastructure, delivering a monitoring experience with a “God’s eye view”.

Benefits of Synthetic Monitoring

Synthetic Monitoring helps enterprises quickly determine the root cause of issues and resolve them by taking actions such as switching to a backup CDN server or reviewing recent WAF configuration changes.

It also helps analyze issues from multiple dimensions, including DNS resolution latency spikes, TLS handshake failures, and HTTP status code distribution.

Conclusion

The value of Synthetic Monitoring lies in its ability to tell users before a “storm” arrives. It does not replace internal monitoring, nor does it challenge the authority of vendors. Instead, it acts as a calm, objective, and tireless digital sentry, standing at the edges of the Internet and asking the most fundamental question: “Can I be accessed right now?”

Enterprises must immediately ask themselves: When a vendor reports a failure, do we have an independent approach to verify it? Does our observability cover the actual access paths of real users? Do we have automated failover or degradation plans, and have we verified their effectiveness through probing?