ASN Lookup for Security Engineers: From Concept to Code
The article discusses the importance of Autonomous System Numbers (ASNs) for security engineers in identifying the network behind an IP address. It explains how ASNs are used for threat attribution, network-level blocking, and infrastructure mapping. The tutorial provides practical guidance on querying ASN data programmatically using curl, Python, and JavaScript.
- ▪An ASN uniquely identifies a network that participates in internet routing via BGP.
- ▪Security engineers use ASN data for threat attribution, network-level blocking, infrastructure mapping, and log enrichment.
- ▪The tutorial includes working code for ASN lookups in curl, Python, and JavaScript using ipgeolocation.io's ASN API.
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try { if(localStorage) { let currentUser = localStorage.getItem('current_user'); if (currentUser) { currentUser = JSON.parse(currentUser); if (currentUser.id === 3915721) { document.getElementById('article-show-container').classList.add('current-user-is-article-author'); } } } } catch (e) { console.error(e); } ABDULLAH AFZAL Posted on May 19 ASN Lookup for Security Engineers: From Concept to Code #security #networking #python #javascript An ASN lookup is the fastest way to find out who actually operates the network behind an IP address. Every publicly routable IP on the internet belongs to an autonomous system, and that autonomous system number (ASN) identifies the network operator, what infrastructure they run, and who they peer with.
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