SsoftverseAdmin57m ago · 10 min readAWS VPC in 2026: The DevOps Guide to Subnets, Routing and Not Locking Yourself OutTL;DR: A VPC is your own slice of AWS networking, and almost everything about it is decided by five choices: the CIDR block (bigger than you think you need, because it can never grow), the subnet layodevopsenginer.hashnode.dev
DDaniel Powley19h ago · 4 min readThe A-Z Weekly Wrap: 30th October 2026Welcome to this week’s atozazure weekly wrap for the 30th October 2026. Below are all the key platform changes, additions and retirements for the past week. AI & Machine Learning Microsoft Copilot Hablog.atozazure.com
SsoftverseAdmin7h ago · 10 min readKubernetes Networking & Ingress Basics (2026): Pods, Services, DNS and Getting Traffic InTL;DR The model in one line: every pod gets a real IP and can talk to every other pod; Services give those shifting pods a stable address; Ingress (or Gateway API) is the front door for HTTP from outdevopsenginer.hashnode.dev
JJoseph O'Shaughnessy9h ago · 11 min readDiagnosing DNS Failures with dig and tcpdump"It's always DNS" is a running joke for a reason. But "DNS is broken" covers a lot of very different problems: a name that doesn't exist, a server that's down, a firewall in the way, or a client askinjosephoshaughnessy.hashnode.dev
NNitin | RouterIPGuide1d ago · 3 min readUnderstanding IPv4 Subnetting and CIDR Notation: Host Calculations and Boundary RulesCalculating IPv4 subnets, broadcast addresses, and assignable host scopes is an essential competency for systems engineers, network architects, and homelab builders. When partitioning address space acrouteripguide.hashnode.dev
JJITPOMI1d ago · 3 min readWhat Happens to a SEYFR File Transfer When Your Network Changes?My workmate in Uganda sent me a video while I was on the road in Utah, USA. It was 221 MB, and I was receiving it on my Android phone using SEYFR and mobile data. I was walking toward the office. That2Cblog.jitpomi.com
AAmit Shukla20h ago · 6 min readWhat actually happens when you type google.com and hit EnterIt is one of the most common interview questions in software, and one of the most useful things to actually understand. When a page is slow, or broken, or only broken for some users, the problem is al1amitshuklabag.hashnode.dev
KKazem Mortazavi21h ago · 3 min readMigrating a Legacy Firewall Without an Outage: Lessons from ASA to FTDA firewall replacement looks like a hardware project, but the hard part is the configuration. I have seen an organization replace its Cisco ASA over a weekend, convert a 2,000-line configuration with securityland.hashnode.dev
JJietion22h ago · 8 min readSatellite NTN and eSIM for IoT Beyond Terrestrial Coverage: What Buyers Should PlanDefinition: Satellite NTN for IoT extends cellular-standard connectivity through satellites or high-altitude platforms where towers do not reach; the eSIM holds the subscription profiles that let one liotsim.hashnode.dev
JJietion22h ago · 9 min readIoT SIM for Wireless Tank and Liquid-Level Control Systems: Telemetry, Alarms and Control LoopsDefinition: An IoT SIM in a tank or liquid-level control system carries level readings, pump states and alarms from the field controller to a remote platform over cellular, so operators can supervise liotsim.hashnode.dev
