Struggling with new IP subnets being incorrectly geolocated and blocked? This guide from a senior DevOps engineer breaks down why it happens and provides three actionable strategies, from quick fixes to the permanent solution using Geofeeds (RFC 9632).

From Blacklisted to Trusted: A DevOps Guide to IP Reputation and Geofeeds

It was 2 AM. PagerDuty was screaming. Our brand new Kubernetes cluster, deployed on a fresh VPC subnet in us-east-1, couldn’t reach a critical payment provider in the UK. The error? 403 Forbidden. After an hour of frantic debugging—checking firewalls, routing tables, and application logs—we found the culprit. The provider’s firewall, using a popular GeoIP database, thought our shiny new Virginia IPs were located in Tehran. This wasn’t a code bug; it was a geography bug, and it was costing us money by the minute. If you’ve ever faced this, you know the unique frustration of your infrastructure being judged by its past life.

So, Why Does This Keep Happening?

Let’s get straight to it. When you get a new block of IPs from AWS, Azure, GCP, or your friendly neighborhood ISP, you’re not getting pristine, factory-sealed addresses. You’re getting recycled goods. That subnet might have previously belonged to a video streaming service in Brazil or, worse, a spam operation in Eastern Europe. The internet’s address book, largely powered by third-party GeoIP database providers like MaxMind, can be painfully slow to update.

These providers scrape data from various sources to map IPs to locations. The process is imperfect and lags reality. The modern, standardized solution is Geofeeds (RFC 9632). This allows a network owner (like your cloud provider) to publish a simple, authoritative CSV file that says, “Hey, internet, this IP block 198.51.100.0/24 is officially in Los Angeles, USA. End of story.” The problem is, while the standard exists, adoption by consumers of this data isn’t universal yet. So, you’re stuck in the messy middle.

Fighting Back: Three Tiers of Reputation Recovery

When your services are down because someone thinks your server prod-db-01 is in the wrong country, you need a plan. Here are the three strategies we use at TechResolve, from the quick and dirty to the long-term fix.

Solution 1: The Manual Grind (aka The Squeaky Wheel)

This is your immediate, brute-force solution. You manually go to every major GeoIP provider and submit a correction request for your IP range. It’s tedious, unglamorous, and feels like you’re filling out DMV paperwork, but it often gets the quickest results for a specific, painful problem.

Your To-Do List:

• Identify which GeoIP service your vendor is using (if you can).
• Go to the correction portals for the big players: MaxMind, IP2Location, Google, etc.
• Submit your IP range and the correct location data. Provide proof if necessary (e.g., a link to your organization’s contact page).
• Wait. And then follow up.

Warning: This is a temporary fix, not a strategy. Every time you spin up a new subnet, you might have to do this all over again. It’s a reactive, “whack-a-mole” approach that doesn’t scale.

Solution 2: The Architect’s Fix – Embrace Geofeeds

This is the “right” way to solve the problem for the long term. Instead of asking every database to fix their records, you provide the authoritative source they should be consuming.

First, check if your provider already publishes a Geofeed. You can often find this by looking up one of your IPs in a WHOIS database and checking the “remarks” or “comments” section for a URL. Most major cloud providers do this now.

If your provider has a Geofeed, you can use that URL as leverage when contacting a service that is blocking you. You can say, “You are incorrectly blocking our IP range. The correct data is published by our provider at this IETF-standard Geofeed URL: [URL].”

If you’re in a position to bring your own IP address space (BYOIP) to the cloud or run your own network, you should publish your own Geofeed. It’s just a simple CSV file hosted on your web server. You then reference its URL in your public WHOIS records.

A simple Geofeed file looks like this:

# My Company's Geofeed Data - Authoritative Source
# Fields: prefix,country,region,city,postal_code
198.51.100.0/24,US,CA,Los Angeles,90001
203.0.113.0/25,DE,BE,Berlin,10115
203.0.113.128/25,DE,HH,Hamburg,20095

This approach establishes a ground truth, making you part of the solution instead of a victim of outdated data.

Solution 3: The ‘Nuke and Pave’ – Just Get New IPs

I hate this option, but I’d be lying if I said I’ve never had to use it. Sometimes, you get an IP block that is so toxic—not just geolocated incorrectly, but also on every spam blacklist known to humanity—that it’s not worth saving. The reputation is shot, and the time it would take to clean it up is longer than the time it would take to just start over.

This is your “break glass in case of emergency” option. The process is painful:

1. De-allocate the entire IP block / subnet.
2. Provision a completely new one from your provider.
3. Update every DNS record, firewall rule, and application configuration that pointed to the old IPs.
4. Pray the new block is cleaner.

This is a high-cost, high-disruption maneuver. It’s an admission of defeat, but sometimes, a tactical retreat is the only way to win the war and get your service back online for your customers.

Comparison of Strategies

Ultimately, dealing with IP reputation is a non-negotiable part of modern cloud architecture. While the industry slowly moves towards adopting standards like Geofeeds, we’re the ones in the trenches who have to manage the messy reality. Start by pushing for the “Architect’s Fix,” but always keep the other plays in your back pocket. You never know when that 2 AM page will come.

Darian Vance

Lead Cloud Architect & DevOps Strategist

With over 12 years in system architecture and automation, Darian specializes in simplifying complex cloud infrastructures. An advocate for open-source solutions, he founded TechResolve to provide engineers with actionable, battle-tested troubleshooting guides and robust software alternatives.

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