BGP & Internet Routing
How the internet routes traffic between networks. BGP fundamentals, ASNs, peering, transit, route filtering, and RPKI security.
What Is BGP?
How BGP routes traffic between autonomous systems to make the internet work.
6 min readASN Numbers Explained
How Autonomous System Numbers are allocated and used in internet routing.
4 min readInternet Peering & Transit
How ISPs and networks exchange traffic through peering agreements and transit providers.
5 min readBGP Route Filtering & Prefix Lists
Learn how BGP route filtering prevents route leaks and hijacks using prefix lists, AS-path filters, and IRR-based filtering.
11 min readRPKI: Securing BGP with Route Origin Validation
How Resource Public Key Infrastructure (RPKI) prevents BGP hijacking by cryptographically validating which ASes are authorized to originate prefixes.
10 min readLooking Glass & BGP Diagnostic Tools
Learn to use BGP looking glass servers, route collectors, and diagnostic tools to troubleshoot routing issues and verify prefix announcements.
9 min read