Commonly Used Log Scrubbing Rules

Commonly Used Log Scrubbing Rules

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Find on this page examples of commonly used log processing rules.

Generic string: “sensitive-info”

Lines containing the string sensitive-info are not sent to Datadog.

  - type: exclude_at_match
    name: exclude_sensitive_info
    pattern: (?:sensitive\-info)

My key

When the string “my_key=” is found, letters, numbers, spaces, and underscores following the string are redacted with my_key=[VALUE REDACTED].

- type: mask_sequences
  name: redact_key_match_letters_numbers_spaces_unders
  replace_placeholder: "my_key=[VALUE REDACTED]"
  pattern: (?:my_key=[A-Za-z0-9\s_]*[A-Za-z0-9][A-Za-z0-9\s_])

When the string “my_key=” is found, all characters following the string until the next period are redacted with my_key=[VALUE REDACTED].

- type: mask_sequences
  name: redact_key_match_to_period
  replace_placeholder: "my_key=[VALUE REDACTED]"
  pattern: (?:my_key=[^.])

Social Security numbers

Redact Social Security numbers.

  - type: mask_sequences
    name: social_security_number_basic
    pattern: (?:\d{3}-?\d{2}-?\d{4})
    replace_placeholder: "[SSN REDACTED]"

Email address

Redact email addresses using the RFC 5322 regex specification.

  - type: mask_sequences
    name: RFC_5322_email
    pattern: (?:[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*|"(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21\x23-\x5b\x5d-\x7f]|\\[\x01-\x09\x0b\x0c\x0e-\x7f])*")@(?:(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?|\[(?:(?:(2(5[0-5]|[0-4][0-9])|1[0-9][0-9]|[1-9]?[0-9]))\.){3}(?:(2(5[0-5]|[0-4][0-9])|1[0-9][0-9]|[1-9]?[0-9])|[a-z0-9-]*[a-z0-9]:(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21-\x5a\x53-\x7f]|\\[\x01-\x09\x0b\x0c\x0e-\x7f])+)\])
    replace_placeholder: "[EMAIL REDACTED]"

Credit card numbers

Redact credit card numbers for Visa, Mastercard, American Express, Diner’s Club, Discover Card, and JCB.

- type: mask_sequences
  name: visa_mc_amex_diners_discover_jcb_credit_card
  replace_placeholder: "[CREDIT CARD REDACTED]"
  pattern: (?:4[0-9]{12}(?:[0-9]{3})?|[25][1-7][0-9]{14}|6(?:011|5[0-9][0-9])[0-9]{12}|3[47][0-9]{13}|3(?:0[0-5]|[68][0-9])[0-9]{11}|(?:2131|1800|35\d{3})\d{11})

The above rule may cause interference when connecting logs and traces as trace IDs can match the above format. If connecting logs and traces and you wish to use the above regular expression, consider the below example:

- type: mask_sequences
  name: visa_mc_amex_diners_discover_jcb_credit_card
  replace_placeholder: "[CREDIT CARD REDACTED]"
  pattern: \b(?:4[0-9]{12}(?:[0-9]{3})?|5[1-5][0-9]{14}|3[47][0-9]{13}|3(?:0[0-5]|[68][0-9])[0-9]{11}|6(?:011|5[0-9]{2})[0-9]{12}|(?:2131|1800|35\d{3})\d{11})\b

Postal codes

Redact postal codes (US).

- type: mask_sequences
  name: postal_codes
  replace_placeholder: "[POSTAL CODE REDACTED]"
  pattern: (?:\d{5}-\d{4}|\d{5}|[A-Z]\d[A-Z] \d[A-Z]\d)

Between parentheses

Redact characters after string ExampleConfig( until the closing paranthesis.

- type: mask_sequences
  name: Example_config_redaction
  replace_placeholder: "ExampleConfig([REDACTED, REDACTED]"
  pattern: (?:ExampleConfig\([^\)]+)

Between brackets

Redact characters after string on Example [ until the closing bracket.

- type: mask_sequences
  name: on_Example_redaction
  replace_placeholder: "on Example [Example REDACTED]"
  pattern: (?:on Example\s?[^\s]+)

Class A IP addresses

Redact Class A IP addresses, range 1.0.0.1 to 126.255.255.254.

- type: mask_sequences
  name: simple_ip_address
  replace_placeholder: "[IP REDACTED]"
  pattern: (?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)

Further Reading


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