EnumX: Auto DNS Lookup for Subdomains with Markdown Export

🎯 Purpose

This workflow automatically scans and collects DNS records for all known subdomains associated with a given domain (e.g., example.com) and emails a formatted markdown report.

🛠️ What It Does
Takes a list of subdomains

Performs DNS lookups for records like:

A

AAAA

CNAME

TXT

MX

NS

SOA

Formats the result in Markdown

Sends an email report to a designated recipient

🌟 Benefits
Visibility: Provides ongoing awareness of DNS configurations for each subdomain

Security: Helps detect misconfigured, stale, or malicious DNS records

Automation: Reduces manual checking or use of third-party services

Audit-ready: Output can be stored or forwarded to SOC or IT security

Easy to read: Markdown formatting allows both tech and non-tech users to review reports

🔒 Compliance Alignment
This workflow supports compliance and best practices across multiple frameworks:
| Framework           | Relevance                                                                   |
| ------------------- | --------------------------------------------------------------------------- |
| **ISO 27001**       | A.12.6.1: Technical vulnerability management (external exposure monitoring) |
| **NIST CSF**        | DE.CM-7: Monitoring for unauthorized connections                            |
| **Essential Eight** | Supports vulnerability awareness and passive monitoring                     |
| **SOC 2**           | Security & Availability — monitoring of system components                   |
| **CIS Controls**    | Control 1 & 8: Inventory and DNS monitoring of assets                       |

📬 Current Output Destination
Email: abc@gmail.com
(Editable for any internal SOC, DevOps, or security contact)

📅 Recommended Schedule
Daily or weekly execution via Cron node

Optional Slack or SIEM integration (future scope)

📌 Tags
#dns-monitoring #compliance #email-report #subdomain-check #automation #n8n