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Monitor Domains & IPs on AbuseIPDB Blacklist with Slack Alerts

by Marth - Business Automationadapted from n8n official workflow galleryUpdated Aug 2026
RequiresCCodeHTTP RequestHTTP RequestSlack
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ScScheduled CheckCoDefine Domains/IPsDefine Domains/…HRQuery Blacklist APIQuery Blacklist…IfIs on Blacklist?Send High-Priority AlertSend High-Prior…1234
1/5
STEPS · 4
Runs on a schedule

⚙ How It Works The automated blacklist monitor is designed to be a proactive, not reactive, tool. Here is the high-level process: Scheduled Checks: At regular intervals (e.g., every 30 minutes or every hour), a monitoring script or service sends a request to a list of predefined DNS blacklists (DNSBLs) and real-time blackhole lists (RBLs). Lookup Queries: For each check, the system performs a lookup query for our specified domains and IP addresses against the various blacklists. It essentially asks, "Is our-ip-address.com on your list?" Status Evaluation: The blacklist service responds with a status: either the asset is clean or it is listed. Alerting Mechanism: If a new listing is detected, the system immediately triggers a notification. This alert contains key information like the asset that was blacklisted (domain or IP), the specific blacklist it was found on (e.g., Spamhaus), and the time of detection. Status Logging: The status of each asset (clean or listed) is logged in a central dashboard. This allows us to track the history of an IP or domain, see when a listing occurred, and when it was resolved. Setup Steps Follow these steps to set up the automated blacklist monitor.

Tags

n8nreference-onlyslack
Connects
CCodeWHTTP RequestSlack
CategorySlack
Triggermanual
Complexitymedium
Nodes5
AddedAug 2, 2025

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