TLS Version Checker
A practical reference for teams that need to verify which TLS protocol versions a host supports.
TLS Version Checker from Sandglass helps you verify which TLS protocol versions a host supports. Use the result to decide what to monitor continuously.
When to reach for this tool
Reach for this when you need to verify which TLS protocol versions a host supports during setup, debugging, or an incident review. A one-off check is useful for diagnosis, but production systems need continuous monitoring once the immediate question is answered.
- Legacy TLS versions are a compliance and security risk.
- Hardening can break older clients, so verify before disabling.
- Protocol support is separate from certificate validity.
From one-off check to continuous monitor
Use the TLS version result to catch outdated protocol support during hardening work, then keep monitoring certificate validity on that host continuously.
- Recreate the same check in Sandglass on an interval so the next change is caught without re-running the lookup.
- Send failures to email, a Slack webhook channel, or a generic webhook owned by whoever fixes the problem.
- Track the result over time instead of treating one manual reading as the final answer.
Why a lookup is not monitoring
Supporting an old TLS version is a slow-moving risk, not an instant outage. Catch it during a review, but do not confuse a protocol check with ongoing availability monitoring.
Use this tool well
Step 1: Run the check and read the result
Use the output to confirm the current state, and treat anything surprising as a starting point for diagnosis rather than a verdict.
Step 2: Define what healthy means
Write down which results count as healthy, degraded, or failed before you automate anything.
Step 3: Promote it to a continuous monitor
Recreate the same check in Sandglass on an interval so the next change is caught automatically.
Step 4: Route the alert to an owner
Send failures to email, a Slack webhook channel, or a generic webhook owned by whoever will fix them.