ASArtem Senenkoinuptimepage.hashnode.dev·7h ago · 14 min readICMP vs TCP vs UDP: the difference, explained for developersTL;DR. ICMP, TCP and UDP all travel inside IP packets, but they ask different questions. ICMP echo (ping) asks "does this address answer at all?" and needs no port. TCP asks "is a program listening on00
MMaulanainmauls.hashnode.dev·2d ago · 13 min readHow IPv4 Subnetting Determines Network and Host AddressesIPv4 subnetting is the process of dividing an IP network into smaller logical networks called subnets. A subnet mask determines which part of an IPv4 address identifies the network and which part iden00
WWaLookupinwalookup.hashnode.dev·3d ago · 5 min readHandling Edge-Case Ambiguity in Network Origin Metadata ResolutionIn distributed systems, the assumption that an IP address maps cleanly to a geographic region or a specific network provider is a common point of failure. When building applications that enforce regio00
DJDevy Jonesindevyjones.hashnode.dev·3d ago · 4 min readHow to Audit Your Public Attack Surface with ScanSearchA service can disappear from your deployment dashboard without disappearing from the internet. Forgotten staging hosts, old load balancers, and temporary admin panels often remain reachable long after00
WWaLookupinwalookup.hashnode.dev·4d ago · 5 min readHandling Race Conditions in Asynchronous Network Origin ResolutionIn distributed systems, the integrity of network origin metadata is often taken for granted. Engineers frequently implement caching layers to reduce latency and costs when verifying identifiers, such 00
Cconnectinipv4tradehub.hashnode.dev·5d ago · 2 min readWhy IPv4 Refuses to Die: The $1.2B Protocol Still Running the WebIn the late 1990s, networking experts predicted that IPv4 (Internet Protocol version 4) would be entirely obsolete by the mid-2010s. Its 32 bit architecture limits the global address pool to roughly 00
AVAtul Vishwakarmainatulcodes.hashnode.dev·5d ago · 7 min readDemystifying AWS Networking (VPCs, Subnets, and Security Groups)Introduction Before deploying your first ECS Fargate cluster, you need to understand AWS networking fundamentals. Most beginners skip this and struggle with "Connection refused" errors later. This gui00
WWaLookupinwalookup.hashnode.dev·5d ago · 5 min readMigrating from Static IP-to-ASN Mapping to Dynamic Network Origin ResolutionManaging network traffic based on Autonomous System Number (ASN) attribution is a common requirement for global infrastructure. Whether you are implementing geo-fencing, applying rate-limiting policie00
JJebitokinsharonjebitok.com·5d ago · 25 min readWireless Security (TryHackMe)Link to the challenge on TryHackMe: Wireless Security Introduction to Wireless Security Wireless technologies have played a key role in enabling connectivity between devices, which has allowed data 00
DJDevy Jonesindevyjones.hashnode.dev·5d ago · 4 min readFinding Exposed APIs and Services: A Practical Guide for DevelopersAs developers, we're constantly building and deploying services, often exposing APIs to the wider internet. While necessary, this also creates potential attack vectors if not properly secured and moni00
