IP intelligence field notes
Detection techniques, risk scoring and abuse-prevention guides — written around the signals we work with every day.
Choosing an IP Intelligence API: Production-Grade Criteria
Evaluate IP intelligence APIs for real-world security needs. Focus on crucial signals like ASN, rDNS, and risk scoring, understanding their practical applications and limitations.
Read articleDetecting VPNs at Login: Balancing Security and User Experience
Strategies for identifying VPNs, proxies, and TOR at login without introducing unnecessary friction for legitimate users. Focus on real signals and their practical application.
Read articleReducing Chargebacks with IP Risk Scoring in Your Fraud Stack
Explore how IP risk scoring integrates into a comprehensive fraud stack to combat chargebacks, focusing on concrete IP intelligence signals and their practical application for engi
Read articleWhat is a Web Proxy? Understanding Browser Proxies in Logs
A technical deep dive for engineers on web proxies, focusing on browser-based implementations and how their presence manifests in system logs. Learn to identify key indicators.
Read articleGDPR and IP Address Data: Handling IP Responsibly in the EU
Engineers need to understand how GDPR impacts IP address collection and processing. This guide covers legal bases, data minimization, and technical safeguards for responsible IP da
Read articleCredential Stuffing Detection: IP-Level Defenses and Attack Patterns
Explore effective IP-level strategies for detecting and mitigating credential stuffing attacks. Learn to identify suspicious traffic patterns and leverage IP intelligence signals l
Read articleWhat is a Hosting Provider IP and Why Does it Look Suspicious?
Understand hosting provider IPs, cloud ranges, and CDNs. Learn why these legitimate services can trigger security flags and how to interpret IP intelligence signals.
Read articleRate Limiting by IP Address: Designing Limits for Shared IP Environments
Effective rate limiting by IP address is challenging with shared IPs. This article details how to design robust limits that handle proxies, VPNs, and NAT.
Read articleIP Allowlisting Best Practices: When It Helps and When It Breaks
Explore the strategic implementation of IP allowlisting, identifying its strengths in secure, predictable environments and its limitations in dynamic, open systems.
Read articleWhy is My IP Flagged as a Proxy? Understanding False Positives
Explaining why legitimate IPs, including residential and mobile, might be mistakenly flagged as proxies, VPNs, or datacenter traffic by IP intelligence systems.
Read articleGeo-Restriction & VPN Bypass: How Licensing Teams Tackle It
An engineer's guide to how streaming and licensing teams detect and block VPNs, proxies, and other evasion tools to enforce geo-restrictions. Real signals and practical limits.
Read articleDetecting Scrapers on an E-commerce Site: Signals that Separate Bots from Buyers
Learn to distinguish automated scrapers from legitimate shoppers on e-commerce platforms. This guide details IP intelligence signals and practical techniques for bot detection.
Read articleCleaning Bot Traffic from Analytics with IP Intelligence
Learn how IP intelligence APIs can identify and filter various forms of bot traffic, including proxies, VPNs, and datacenter IPs, to ensure accurate web analytics.
Read articleMobile Carrier IPs and Shared NAT: Why Blocking One Hits Thousands
Blocking a single mobile IP can inadvertently impact a large user base due to Carrier-Grade NAT (CGNAT). This article explores the technical nuances and implications for security e
Read articleIPv6 and Proxy Detection: What Changes for IP Intelligence
Explores the impact of IPv6 on proxy detection, detailing how IP intelligence signals like ASN, rDNS, and hosting ranges adapt and where new challenges arise.
Read articleProtecting a Signup Form from Abuse: A Layered Approach
Learn how to combine rate limits, IP intelligence, and device checks to robustly defend signup forms against botnets, credential stuffing, and other abuse vectors.
Read articleOpen Proxy Risks for Websites: Why They Dominate Abuse Traffic
Examine why open proxies are a persistent vector in website abuse. Understand their role in credential stuffing, content scraping, and fraud, and learn how to detect them.
Read articleWhat is a SOCKS5 Proxy: Deep Dive for Network Engineers
Explores SOCKS5 proxy functionality, traffic patterns, and detection methods for security professionals. Includes realistic examples and technical indicators.
Read articleBlocking Bots Without Blocking Customers: Balancing False Positives
Learn how to effectively block malicious bots and mitigate IP-based threats without negatively impacting legitimate users. This article delves into IP intelligence signals and stra
Read articleGeolocation Accuracy of IP Addresses: City vs. Country Expectations
An honest look at IP address geolocation accuracy. We discuss the nuances of city vs. country data, common signals, and realistic expectations for network security engineers.
Read articlePreventing Payment Fraud with IP Checks: What IP Data Reveals
A deep dive into how IP intelligence, including ASN, rDNS, and risk scores, helps identify and prevent payment fraud, alongside its inherent limitations.
Read articleLayered Defenses: How IP Intelligence Helps Stop Fake Account Signups
Learn how to combat fake account signups with a multi-layered security approach, integrating IP intelligence signals like proxy, VPN, TOR, and datacenter detection alongside other
Read articleIP Reputation Score Explained: What It Is and How to Use It
A deep dive into how IP reputation scores are calculated, including specific signals like ASN, rDNS, and proxy detection, and practical advice for network engineers on acting upon
Read articleTOR Exit Node Detection: Understanding Exit Lists and Their Limits
A deep dive into how TOR exit node detection works using publicly available lists, and a frank discussion of the inherent limitations of this approach.
Read articleDatacenter IP vs. Residential IP: How to Tell Them Apart and When It Matters
Distinguishing datacenter from residential IPs is crucial for security and fraud prevention. Learn the key signals, their limitations, and practical applications.
Read articleUnderstanding What an ASN Is: A Network Engineer's Guide
Explore ASNs (Autonomous System Numbers) from a network security perspective. Learn their role, how they're identified, and their utility in IP intelligence and risk assessment.
Read articleResidential Proxy Detection: Unmasking the Elusive IP
Explores why residential proxies are notoriously difficult to detect and the advanced signals security engineers can use to identify them.
Read articlePractical VPN Connection Detection Signals
An engineer's guide to detecting VPNs, proxies, and TOR exits, detailing what each IP intelligence signal truly indicates and its limitations.
Read articleA Practical API Integration Checklist for IP Lookups
Timeouts, caching, fail-open policy, header parsing and key hygiene — the engineering details that decide whether an IP intelligence integration survives production.
Read articleDesigning a Risk Score That Your Team Will Actually Trust
A risk score is only useful if analysts believe it. How to weight signals, keep the reasoning visible, calibrate thresholds and review outcomes over time.
Read articleCGNAT Explained: Why One IP Address Is Not One User
Carrier-grade NAT puts thousands of subscribers behind a single address. Here is what that breaks in IP-based blocking, rate limiting and analytics — and what to do instead.
Read articleReading an IP Lookup Result: A Field Guide for Support Teams
How to interpret connection type, ASN, geolocation and risk score when a customer disputes a block — a practical walkthrough for support and trust teams.
Read articleWelcome to Guarda: IP Intelligence for Real Traffic Decisions
An introduction to Guarda — what our IP intelligence API checks, how the risk score is built, and how teams use it to separate real users from proxies, VPNs and bots.
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