Why Network Operators Need Route Origin Authorization (ROA)
A ROA states which network may originate a route. Learn how to prepare it, check its effect and change networks without confusing a signed record with guaranteed delivery.
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RPKI vs BGP security
BGP exchanges routes; RPKI supplies evidence for checking their origins. Understand what that check protects, what it leaves open, and who controls the evidence.
How Resource Public Key Infrastructure Works
Follow an RPKI authorisation from address holder to router, and understand Lu Heng’s case for keeping the service reliable and its administrator replaceable.
What Is RPKI? A Beginner’s Guide to Routing Security
How RPKI checks route origins, what its results mean, and why Lu Heng argues that reliable security also needs limits on registry power.
How ISPs Manage IP Allocation on a Large Scale
How an ISP connects address pools to customer service: allocation, routing, demand, sharing, retirement and the boundary between coordination and control.
Top challenges IP brokers face in the IPv4 market
What an IPv4 broker must get right: the parties, the offer, the registry process, the working network and support after the transaction.
How to Transfer IP Addresses Between RIR Regions
What to check before an inter-RIR IPv4 transfer, how to preserve network continuity, and why Lu Heng separates authentication from investment approval.
How ARIN and APNIC Policies Impact Internet Accessibility
How do registry rules affect a network’s expansion? Understand transfers, needs assessment and Lu Heng’s argument for operator independence.
What Is a Public IP Address? A Beginner’s Guide to Routing and Continuity
Understand public and private IP addresses, NAT, IPv4 and IPv6, then see why an address is part of network continuity rather than a complete identity or ownership claim.
Understanding IPv4 address structure and classes
Understand IPv4 prefixes through one /24 example, how it splits into /25 blocks, and why modern CIDR is more useful than guessing an address class.
Step-by-step guide to lease IP addresses safely
From choosing an IPv4 block to testing, operating and leaving a lease: practical steps that connect usable addresses to long-term continuity.
Top Reason IP Addresses Get Blacklisted
Discover the most common reasons IP addresses get blacklisted, from spam activity to poor server security. Learn how to protect your IP reputation and keep your network safe.