Logs for the probe:
time=2026-05-13T13:01:05.673+03:00 level=ERROR source=http.go:147 msg="Missing required header" module=http_2xx target=https://estate.mmc.help header=Access-Control-Allow-Origin
time=2026-05-13T13:01:05.673+03:00 level=ERROR source=handler.go:130 msg="Probe failed" module=http_2xx target=https://estate.mmc.help duration_seconds=0.006551259



Metrics that would have been returned:
# HELP probe_dns_lookup_time_seconds Returns the time taken for probe dns lookup in seconds
# TYPE probe_dns_lookup_time_seconds gauge
probe_dns_lookup_time_seconds 0.001133536
# HELP probe_duration_seconds Returns how long the probe took to complete in seconds
# TYPE probe_duration_seconds gauge
probe_duration_seconds 0.006551259
# HELP probe_failed_due_to_regex Indicates if probe failed due to regex
# TYPE probe_failed_due_to_regex gauge
probe_failed_due_to_regex 1
# HELP probe_http_content_length Length of http content response
# TYPE probe_http_content_length gauge
probe_http_content_length 633
# HELP probe_http_duration_seconds Duration of http request by phase, summed over all redirects
# TYPE probe_http_duration_seconds gauge
probe_http_duration_seconds{phase="connect"} 0.000580521
probe_http_duration_seconds{phase="processing"} 0.002340342
probe_http_duration_seconds{phase="resolve"} 0.001133536
probe_http_duration_seconds{phase="tls"} 0.001982296
probe_http_duration_seconds{phase="transfer"} 0.000121137
# HELP probe_http_last_modified_timestamp_seconds Returns the Last-Modified HTTP response header in unixtime
# TYPE probe_http_last_modified_timestamp_seconds gauge
probe_http_last_modified_timestamp_seconds 1.776769436e+09
# HELP probe_http_redirects The number of redirects
# TYPE probe_http_redirects gauge
probe_http_redirects 0
# HELP probe_http_ssl Indicates if SSL was used for the final redirect
# TYPE probe_http_ssl gauge
probe_http_ssl 1
# HELP probe_http_status_code Response HTTP status code
# TYPE probe_http_status_code gauge
probe_http_status_code 200
# HELP probe_http_uncompressed_body_length Length of uncompressed response body
# TYPE probe_http_uncompressed_body_length gauge
probe_http_uncompressed_body_length 633
# HELP probe_http_version Returns the version of HTTP of the probe response
# TYPE probe_http_version gauge
probe_http_version 2
# HELP probe_ip_addr_hash Specifies the hash of IP address. It's useful to detect if the IP address changes.
# TYPE probe_ip_addr_hash gauge
probe_ip_addr_hash 2.2996125e+08
# HELP probe_ip_protocol Specifies whether probe ip protocol is IP4 or IP6
# TYPE probe_ip_protocol gauge
probe_ip_protocol 4
# HELP probe_ssl_earliest_cert_expiry Returns last SSL chain expiry in unixtime
# TYPE probe_ssl_earliest_cert_expiry gauge
probe_ssl_earliest_cert_expiry 1.783834229e+09
# HELP probe_ssl_last_chain_expiry_timestamp_seconds Returns last SSL chain expiry in timestamp
# TYPE probe_ssl_last_chain_expiry_timestamp_seconds gauge
probe_ssl_last_chain_expiry_timestamp_seconds -6.21355968e+10
# HELP probe_ssl_last_chain_info Contains SSL leaf certificate information
# TYPE probe_ssl_last_chain_info gauge
probe_ssl_last_chain_info{fingerprint_sha256="0f9901d02a93eae7052c775c3521953a5e295458440794e896b3e9bae7f216f6",issuer="CN=R13,O=Let's Encrypt,C=US",serialnumber="057b1e52eb8f9262d8f945bbbee1abab13df",subject="CN=mmc.help",subjectalternative="*.mmc.help,*.mmchelptech.ru,mmc.help,mmchelptech.ru"} 1
# HELP probe_success Displays whether or not the probe was a success
# TYPE probe_success gauge
probe_success 0
# HELP probe_tls_cipher_info Returns the TLS cipher negotiated during handshake
# TYPE probe_tls_cipher_info gauge
probe_tls_cipher_info{cipher="TLS_AES_128_GCM_SHA256"} 1
# HELP probe_tls_version_info Returns the TLS version used or NaN when unknown
# TYPE probe_tls_version_info gauge
probe_tls_version_info{version="TLS 1.3"} 1



Module configuration:
prober: http
timeout: 30s
http:
  valid_status_codes:
  - 200
  - 302
  - 301
  - 304
  - 308
  - 401
  - 403
  valid_http_versions:
  - HTTP/1.1
  - HTTP/2.0
  preferred_ip_protocol: ip4
  method: GET
  fail_if_body_matches_regexp:
  - Could not connect to database
  fail_if_header_matches:
  - header: Set-Cookie
    regexp: .*
    allow_missing: true
  fail_if_header_not_matches:
  - header: Access-Control-Allow-Origin
    regexp: (\*|example\.com)
  tls_config:
    insecure_skip_verify: true
  follow_redirects: false
  enable_http2: true
tcp:
  ip_protocol_fallback: true
icmp:
  ip_protocol_fallback: true
  ttl: 64
dns:
  ip_protocol_fallback: true
  recursion_desired: true