External services like smtp.gmail.com and xmpp.earth can be unreliable
in CI environments. Added retry logic (up to 3 attempts) to prevent
false test failures due to network issues.
- Replace client.badssl.com tests with unit tests for parseTlsAlertNumber and getTlsAlertName
- Export helper functions for testing
- Keep one integration test for connection success scenario
- Test rejection when expecting TLS alert but connection succeeds
- Test UP status when expected TLS alert is received
- Test rejection when different TLS alert is received than expected
Error messages could be translated, but TLS alert names (e.g., certificate_required)
are from RFC 8446 spec and should remain in English for consistency.
- Use i18n-t for description with code tag and RFC 8446 spec link
- Add comment that TLS alert names are from spec (not translatable)
- Refactor TCP monitor into smaller functions:
- checkTcp() for standard TCP connectivity check
- performStartTls() for STARTTLS handshake
- checkTlsCertificate() for TLS certificate validation
- attemptTlsConnection() for TLS connection with alert capture
- Improve error messages with more context
Per CommanderStorm's feedback, instead of creating a separate TLS monitor
type, add the TLS alert checking functionality directly to the existing
TCP monitor.
Changes:
- Add TLS_ALERT_CODES, parseTlsAlertNumber(), getTlsAlertName() to tcp.js
- Add checkTlsAlert() method to TCPMonitorType for mTLS verification
- Add 'Expected TLS Alert' dropdown to TCP monitor UI
- Remove separate TLS monitor type (tls.js)
This allows users to verify mTLS endpoints reject connections without
client certificates by expecting specific TLS alerts like
'certificate_required'.
Closes#5837
Add a new TLS monitor type that allows monitoring mTLS endpoints to verify
they properly reject connections without client certificates.
Features:
- New TLS monitor type with hostname and port configuration
- Expected TLS Alert dropdown to specify which TLS alert to expect
- Support for certificate_required (116) alert for mTLS verification
- Optional certificate expiry monitoring when connection succeeds
- Ignore TLS errors option
Closes#5837
