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Auth & security at scale

OAuth2, JWT, IAM patterns, secrets rotation, and least-privilege service auth.

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Auth & security at scale medium

How to mock DNS CAA record lookups in Python

Parse and filter DNS CAA records with a mock lookup function, demonstrating how certificate authorities validate domain authorization.

dns security caa
Python 
import dnslib

def parse_caa_record(record_string):
    """Parse a DNS CAA record string into its components."""
    parts = record_string.split()
    flags = int(parts[0])
    tag = parts[1]
    value = parts[2]
    return flags, tag, value

def mock_caa_lookup(domain, caa_records):
    """Mock DNS CAA lookup that re…
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