CRL Monitor

Alias	Status	Message	Download	Next update	Last run	Freq

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Alias * Certificate to check (PEM) * Issuer certificate (PEM) * CRL URL (optional — falls back to the cert's CRL Distribution Points extension)

Check frequency (minutes)

Uptime Kuma push URL (optional)

Scheduling

Safety window (minutes) — added after the CRL's nextUpdate; blank inherits

Retry after failure (minutes) — re-check sooner after an error; 0 disables; blank inherits

Enabled

Verification tests

Foundational URL resolution, reachability, HTTP 200 and CRL parsing always run. Choose which additional tests determine this monitor's status.

Use the global default set

Response-time threshold (ms) — only used by the “Response-time threshold” test; blank inherits the global default

Debug logging

Log only failures

Log Uptime Kuma pushes

Show the tests that were run under each monitor

Default verification tests

Applied to any monitor set to “Use the global default set”.

Default response-time threshold (ms) Default scheduling

How the next check is scheduled for monitors set to inherit the default.

Default safety window (minutes)

Added after the CRL's nextUpdate before the next check, to allow for publication and propagation delays.

Default retry after failure (minutes)

After a failed check, re-check after this interval instead of the normal schedule. 0 disables. Used by monitors that don't set their own.

Exponential backoff on repeated failures

Retry backoff cap (minutes) Keep CRL data for (days)

How long captured CRL metadata snapshots are retained. 0 keeps them indefinitely.

Maximum CRL download size (MiB)

CRLs larger than this are rejected. Raise it for large CRLs (some US-government CAs publish CRLs of tens of MiB).

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Down counts as

Disabled periods

Exclude maintenance

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