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DNS

390 articles · Page 1 of 4
Raymond Ops
Raymond Ops
Jun 27, 2026 · Operations

Hands‑On DNS Ops: Deploy BIND and CoreDNS with Full Troubleshooting Guide

This comprehensive guide walks you through DNS fundamentals, compares BIND, CoreDNS, PowerDNS and Unbound, provides step‑by‑step deployment scripts for BIND 9.20 and CoreDNS 1.12, explains DNSSEC configuration, caching optimizations, security hardening, high‑availability designs, monitoring, backup and recovery procedures, and advanced troubleshooting techniques.

BINDCoreDNSDNS
0 likes · 43 min read
Hands‑On DNS Ops: Deploy BIND and CoreDNS with Full Troubleshooting Guide
Black & White Path
Black & White Path
Jun 22, 2026 · Information Security

How DNSStager Hides Malware in DNS Queries for Stealthy Penetration Testing

DNSStager is an open‑source tool that encodes, splits, and embeds payloads into DNS AAAA or TXT records, uses a fake DNS server to deliver the chunks, reassembles them on the target, and injects the shellcode directly into memory, enabling covert malware delivery when only DNS traffic is allowed.

Cobalt StrikeDNSMemory Injection
0 likes · 10 min read
How DNSStager Hides Malware in DNS Queries for Stealthy Penetration Testing
Java Architect Handbook
Java Architect Handbook
May 28, 2026 · Fundamentals

What Really Happens When You Hit Enter After Typing a URL?

The article breaks down the complete browser workflow from URL entry to page rendering, covering URL parsing, DNS lookup (recursive and iterative), TCP three‑way handshake, TLS negotiation, HTTP request/response exchange, and the final rendering steps, while also providing interview‑focused Q&A and a memorization mnemonic.

DNSHTTPNetwork
0 likes · 15 min read
What Really Happens When You Hit Enter After Typing a URL?
Ops Community
Ops Community
Mar 29, 2026 · Operations

Why DNS Lookups Fail and How to Fix Them: A Complete Troubleshooting Guide

This guide explains the DNS resolution process, categorises common failure types, provides step‑by‑step troubleshooting procedures, essential commands, configuration examples for systemd‑resolved, BIND9, Unbound and CoreDNS, and offers best‑practice recommendations for reliable DNS operation in Linux and Kubernetes environments.

DNSLinuxkubernetes
0 likes · 50 min read
Why DNS Lookups Fail and How to Fix Them: A Complete Troubleshooting Guide
MaGe Linux Operations
MaGe Linux Operations
Mar 5, 2026 · Operations

Master DNS Operations: Deploy BIND & CoreDNS with Real‑World Troubleshooting

This guide walks you through DNS fundamentals, compares BIND, CoreDNS, PowerDNS and Unbound, provides step‑by‑step installation and configuration scripts for BIND 9 and CoreDNS on Linux and Kubernetes, explains caching, DNSSEC, security hardening, high‑availability designs, monitoring, backup and recovery, and shares best‑practice tips for production environments.

BINDCoreDNSDNS
0 likes · 44 min read
Master DNS Operations: Deploy BIND & CoreDNS with Real‑World Troubleshooting
Linux Tech Enthusiast
Linux Tech Enthusiast
Feb 21, 2026 · Fundamentals

What Happens After You Type a URL? A Step‑by‑Step Animation

When you enter a URL, the browser checks multiple caches for the IP, performs recursive DNS lookup if needed, establishes a TCP connection and HTTPS handshake, sends an HTTP request, receives a 200 response, and then parses HTML, CSS, and JavaScript to build and render the page.

DNSHTTPSTCP
0 likes · 4 min read
What Happens After You Type a URL? A Step‑by‑Step Animation
Deepin Linux
Deepin Linux
Feb 15, 2026 · Fundamentals

Mastering DNS: From Basics to Advanced Optimization Techniques

This comprehensive guide explains the DNS system, covering its core concepts, hierarchical domain structure, server types, configuration files, detailed resolution workflow, common record types, performance‑boosting optimizations, and step‑by‑step troubleshooting methods for typical DNS failures.

DNSDNS OptimizationDNS Records
0 likes · 30 min read
Mastering DNS: From Basics to Advanced Optimization Techniques
Code Wrench
Code Wrench
Jan 10, 2026 · Cloud Native

CoreDNS Uncovered: Why It Powers Kubernetes DNS Perfectly

By dissecting CoreDNS’s source code, this article reveals how its minimalist, plugin‑driven architecture serves as a lightweight DNS runtime for Kubernetes, detailing startup flow, Corefile processing, the plugin Handler interface, request chaining via the responsibility‑chain pattern, and the design advantages that suit dynamic cloud‑native environments.

CloudNativeCoreDNSDNS
0 likes · 9 min read
CoreDNS Uncovered: Why It Powers Kubernetes DNS Perfectly
IT Services Circle
IT Services Circle
Dec 18, 2025 · Fundamentals

Which Public DNS Is Faster in China? 114.114.114.114 vs Google 8.8.8.8

This article compares the Chinese public DNS service 114.114.114.114 with Google’s 8.8.8.8 across five dimensions—query speed, stability, content‑filtering policy, privacy protection, and network compatibility—to help users choose the most suitable resolver for mainland China or overseas use.

114DNSChinaDNS
0 likes · 7 min read
Which Public DNS Is Faster in China? 114.114.114.114 vs Google 8.8.8.8
IT Services Circle
IT Services Circle
Dec 14, 2025 · Backend Development

What Lenovo Backend Interview Reveals: Salary Insights, Deadlock Basics, DNS, TLS Handshake, and Java ArrayList Deep Dive

This article shares Lenovo's 2026 graduate hiring salary breakdown, explains deadlock conditions and prevention, outlines DNS resolution steps, details the TLS handshake process, and provides an in‑depth guide to Java's ArrayList implementation, performance, and thread‑safety concerns.

ArrayListDNSDeadlock
0 likes · 18 min read
What Lenovo Backend Interview Reveals: Salary Insights, Deadlock Basics, DNS, TLS Handshake, and Java ArrayList Deep Dive
Raymond Ops
Raymond Ops
Nov 25, 2025 · Frontend Development

Master the Web in 5 Minutes: How Domains, HTML, and Pages Connect

This article provides a concise, beginner‑friendly overview of how domain names map to IP addresses, the DNS resolution process, the distinction between static and dynamic web pages, and the fundamental structure and tags of HTML, giving readers a solid foundation for web development.

DNSDomain NamesDynamic Pages
0 likes · 9 min read
Master the Web in 5 Minutes: How Domains, HTML, and Pages Connect
IT Services Circle
IT Services Circle
Nov 23, 2025 · Fundamentals

How Does Your Device Get an IP Address? Inside the DHCP Journey

When a device connects to a network, it initiates a DHCP discovery process, receives an IP address offer, confirms the assignment, and eventually leases the address, with static and dynamic options, subnet masks, gateways, DNS settings, renewal cycles, and conflict resolution all playing crucial roles.

DHCPDNSDynamic IP
0 likes · 12 min read
How Does Your Device Get an IP Address? Inside the DHCP Journey
NiuNiu MaTe
NiuNiu MaTe
Nov 20, 2025 · Fundamentals

How DNS Translates Domain Names to IP Addresses and Keeps the Web Fast

This article explains the role of DNS as the hidden navigator that maps human‑readable domain names to IP addresses, details the four‑layer caching hierarchy, walks through recursive and iterative query flows, outlines common DNS failures, and offers practical troubleshooting and performance‑boosting tips.

CachingDNSDomain Name System
0 likes · 17 min read
How DNS Translates Domain Names to IP Addresses and Keeps the Web Fast
21CTO
21CTO
Nov 18, 2025 · Operations

What Cloudflare’s Latest Outage Reveals About Cloud Dependency Risks

A massive Cloudflare outage on November 18, 2025 crippled DNS and CDN services, causing widespread failures for platforms like ChatGPT and Discord, and the article analyzes the incident, past failures, and offers four practical resilience strategies to mitigate over‑reliance on single cloud providers.

CDNCloudflareDNS
0 likes · 7 min read
What Cloudflare’s Latest Outage Reveals About Cloud Dependency Risks
Ray's Galactic Tech
Ray's Galactic Tech
Oct 31, 2025 · Operations

Master Linux DNS: Deep Dive into Mechanics and Best Practices

Linux DNS goes far beyond simple name‑to‑IP translation, involving hierarchical resolution, caching, and modern components like systemd‑resolved; this guide explains core concepts, the full lookup process, essential configuration files, and practical best‑practice steps such as reliable resolvers, cache management, DNSSEC, encrypted transport, and diagnostic tools.

DNSLinuxnetworking
0 likes · 9 min read
Master Linux DNS: Deep Dive into Mechanics and Best Practices
Xiao Liu Lab
Xiao Liu Lab
Oct 24, 2025 · Operations

Why Nginx Caches DNS for Weeks and How to Fix It

In production, Nginx cached DNS lookups for up to a month, causing requests to stale IPs after CDN changes; this article explains the root cause, demonstrates how to configure upstream health checks and the built‑in resolver to ensure timely DNS updates and avoid prolonged outages.

DNSOperationsload balancing
0 likes · 6 min read
Why Nginx Caches DNS for Weeks and How to Fix It
Raymond Ops
Raymond Ops
Oct 12, 2025 · Operations

Step-by-Step Guide to Building a DNS Server on Linux

Learn how to configure a full-featured DNS server on Linux, covering DNS fundamentals, local caching, recursive and forward queries, BIND installation, detailed named.conf settings, zone file creation for forward and reverse lookups, and client testing, with troubleshooting tips and common pitfalls.

BINDDNSLinux
0 likes · 13 min read
Step-by-Step Guide to Building a DNS Server on Linux
Raymond Ops
Raymond Ops
Oct 9, 2025 · Fundamentals

What Is a Computer Network? From OSI Layers to TCP/UDP and DNS Explained

This article introduces computer networks by defining them, describing their hardware and software components, functions, classification by scope and topology, then explains the OSI seven‑layer model, the differences between TCP and UDP protocols, DNS operation, and the step‑by‑step process a user follows to access a website.

Computer NetworksDNSOSI model
0 likes · 26 min read
What Is a Computer Network? From OSI Layers to TCP/UDP and DNS Explained
Alibaba Cloud Infrastructure
Alibaba Cloud Infrastructure
Sep 30, 2025 · Cloud Computing

How DNS and IPv6 Innovations Are Shaping the Resilient Internet – Insights from the 2025 Cloud Expo

At the 2025 Cloud Expo in Hangzhou, leading experts including Academician Wu Hequan presented new developments in DNS and IPv6, unveiling Alibaba Cloud’s DNS product suite, whitepapers, and the Zhejiang Province IPv6 and Next‑Generation Internet Innovation Lab’s latest research, highlighting the role of resilient internet infrastructure in the AI era.

AICloud ComputingDNS
0 likes · 5 min read
How DNS and IPv6 Innovations Are Shaping the Resilient Internet – Insights from the 2025 Cloud Expo
Efficient Ops
Efficient Ops
Sep 24, 2025 · Fundamentals

What Is a VLAN and How Do Routers, Switches, and Gateways Work?

This article explains VLAN concepts, using classroom analogies, then details single‑arm routing, layer‑3 switches, gateways, DNS, MAC addresses, and subnet masks, illustrating how network segmentation improves efficiency and how devices communicate across different broadcast domains.

DNSLayer 3 SwitchMAC address
0 likes · 13 min read
What Is a VLAN and How Do Routers, Switches, and Gateways Work?
Raymond Ops
Raymond Ops
Sep 21, 2025 · Operations

Master Network Troubleshooting: A Step‑by‑Step Guide for Any IT Pro

This article presents a comprehensive, systematic approach to network troubleshooting, covering essential preconditions, OSI/TCP‑IP fundamentals, common devices, typical SMB architectures, key Windows and Linux commands, and a detailed step‑by‑step workflow illustrated with diagrams to help quickly isolate and resolve connectivity issues.

DNSLinux commandsNetwork Architecture
0 likes · 15 min read
Master Network Troubleshooting: A Step‑by‑Step Guide for Any IT Pro
Alibaba Cloud Infrastructure
Alibaba Cloud Infrastructure
Sep 12, 2025 · Artificial Intelligence

How AI is Transforming DNS: Insights from China’s 2025 DNS+ Innovation Summit

At a 2025 summit co‑hosted by the National Engineering Lab for Internet Domain Name Management and Alibaba Cloud, over 30 experts from government, academia, and industry discussed AI‑driven DNS innovations, security measures like SRv6 compression and RPKI, and collaborative standards to accelerate next‑generation internet infrastructure in China.

DNSInternet infrastructureRPKI
0 likes · 4 min read
How AI is Transforming DNS: Insights from China’s 2025 DNS+ Innovation Summit
Raymond Ops
Raymond Ops
Aug 8, 2025 · Operations

How DNS Works: From Browser Query to IP Resolution and Server Configuration

This article explains the DNS protocol, covering forward and reverse lookups, the step‑by‑step query process involving caches, root, TLD and authoritative servers, and provides practical BIND configuration examples for forward, reverse, slave, and forwarding DNS setups.

BINDDNSRecursive Lookup
0 likes · 13 min read
How DNS Works: From Browser Query to IP Resolution and Server Configuration
Raymond Ops
Raymond Ops
Jul 17, 2025 · Operations

Essential Ops Toolkit: Unified Account Management, Automation, DNS, and More

This guide reviews a comprehensive set of operations tools—including LDAP, JumpServer, Fabric, Ansible, dnsmasq, pdnsd, ApacheBench, TCPcopy, PortSentry, fail2ban, knockd, Vagrant, Docker, ELK, and Smokeping—detailing their features, advantages, and typical use cases for modern infrastructure management.

DNSLoggingOperations
0 likes · 8 min read
Essential Ops Toolkit: Unified Account Management, Automation, DNS, and More
Raymond Ops
Raymond Ops
Jul 7, 2025 · Operations

How Does a Browser Find a Website? DNS, TCP Handshake, and Server Setup Explained

This article walks through the complete process from entering a URL in a browser to rendering a webpage, covering client DNS resolution, TCP three‑way handshake, HTTP request/response flow, DNS hierarchy, key terminology, using dig for troubleshooting, and step‑by‑step guides to build your own DNS server with BIND or dnsmasq.

BINDDNSDnsmasq
0 likes · 17 min read
How Does a Browser Find a Website? DNS, TCP Handshake, and Server Setup Explained
MaGe Linux Operations
MaGe Linux Operations
Jul 3, 2025 · Frontend Development

Master Web Basics in 5 Minutes: Domains, HTML, and Page Relationships

This guide quickly explains how domain names work, the structure and resolution process of DNS, the fundamentals of HTML syntax and file structure, the differences between static and dynamic web pages, and the evolution from Web 1.0 to Web 4.0, providing a solid foundation for beginners.

DNSDomain NameHTML
0 likes · 9 min read
Master Web Basics in 5 Minutes: Domains, HTML, and Page Relationships
MaGe Linux Operations
MaGe Linux Operations
Jul 2, 2025 · Operations

Master BIND DNS Server: Installation, Configuration, and Testing Guide

This comprehensive guide walks you through installing BIND on Linux, configuring primary and secondary DNS zones, setting up forward and reverse lookups, managing zone files, and testing resolution on both Windows and Linux clients, providing step‑by‑step commands and configuration examples.

BINDDNSsystem-administration
0 likes · 16 min read
Master BIND DNS Server: Installation, Configuration, and Testing Guide
Ops Community
Ops Community
Jun 19, 2025 · Operations

How to Set Up a BIND DNS Server on Linux: Step‑by‑Step Guide

This guide walks you through installing BIND on Linux, configuring forward and reverse DNS, setting ports, logging, access controls, forwarders, zone files, master‑slave replication, AppArmor adjustments, and testing the DNS service with tools like dig, host, and nslookup.

AppArmorBINDConfiguration
0 likes · 25 min read
How to Set Up a BIND DNS Server on Linux: Step‑by‑Step Guide
Liangxu Linux
Liangxu Linux
Jun 4, 2025 · Fundamentals

Master DNS on Linux: Install BIND and Configure Forward & Reverse Zones

This guide walks you through installing the BIND DNS server on a Linux system, configuring global options, creating forward and reverse zone files, testing with dig, and managing the named service, providing a complete hands‑on tutorial for setting up a functional DNS server.

BINDDNSForward Zone
0 likes · 26 min read
Master DNS on Linux: Install BIND and Configure Forward & Reverse Zones
Open Source Linux
Open Source Linux
May 28, 2025 · Operations

How to Navigate Chinese ICP Filing: From Initial Review to Authority Approval

This guide thoroughly explains China's ICP domain filing process—from initial provider review to the communications authority's final approval—detailing each procedural step, DNS resolution impacts, cloud provider policies, technical workarounds, best practices, and scripts to help developers ensure compliance and smooth deployment.

ChinaCloud providersDNS
0 likes · 14 min read
How to Navigate Chinese ICP Filing: From Initial Review to Authority Approval
ITPUB
ITPUB
May 18, 2025 · Backend Development

Why Tomcat Alone Isn’t Enough: Leveraging Nginx for Reliable Web Services

The article explains the practical limitations of using only Tomcat—such as DNS IP caps, scaling costs, deployment downtime, and lack of health checks—and demonstrates how adding Nginx as a reverse proxy and load balancer resolves these issues with concrete configuration examples.

DNSNGINXReverse Proxy
0 likes · 10 min read
Why Tomcat Alone Isn’t Enough: Leveraging Nginx for Reliable Web Services
Raymond Ops
Raymond Ops
May 3, 2025 · Operations

Master Linux DNS: From Basics to Advanced BIND9 Configuration

Explore the essential role of DNS in the internet, learn how Linux resolves domain names, configure resolvers via /etc/resolv.conf, NetworkManager, systemd-resolved, set up a BIND9 server with zone files, and discover advanced techniques like DNSSEC, DoH, split views, and troubleshooting tools.

BIND9DNSLinux
0 likes · 11 min read
Master Linux DNS: From Basics to Advanced BIND9 Configuration
Lin is Dream
Lin is Dream
Mar 15, 2025 · Fundamentals

Mastering macOS Network Settings: DHCP, DNS, NAT, VPN & More Explained

This guide walks through macOS network configuration on a MacBook Pro M1, covering Wi‑Fi advanced settings, TCP/IP fundamentals such as DHCP, IP addressing and subnet masks, NAT translation, routing tables, DNS servers, proxy types, VPN (L2TP) setup, SSH usage, and Ethernet interface details.

DHCPDNSNAT
0 likes · 18 min read
Mastering macOS Network Settings: DHCP, DNS, NAT, VPN & More Explained
Practical DevOps Architecture
Practical DevOps Architecture
Mar 7, 2025 · Cloud Native

Kubernetes DNS Resolution Issues and Troubleshooting Guide

This article explains common Kubernetes DNS resolution failures, both for external domains and internal service discovery addresses, and provides a step‑by‑step troubleshooting workflow that includes checking CoreDNS, examining resolv.conf, adjusting DNS settings, and recreating CoreDNS when necessary.

CoreDNSDNScluster
0 likes · 6 min read
Kubernetes DNS Resolution Issues and Troubleshooting Guide
Practical DevOps Architecture
Practical DevOps Architecture
Mar 5, 2025 · Cloud Native

Kubernetes DNS Resolution Issues and Troubleshooting Guide

This guide explains common Kubernetes DNS problems—including failure to resolve external domains, inter‑pod service discovery addresses, and related impacts on applications like Nginx reverse proxies—and provides step‑by‑step troubleshooting procedures such as checking CoreDNS, inspecting resolv.conf, and customizing dnsPolicy and dnsConfig in pod specifications.

Cloud NativeCoreDNSDNS
0 likes · 6 min read
Kubernetes DNS Resolution Issues and Troubleshooting Guide
Raymond Ops
Raymond Ops
Feb 11, 2025 · Fundamentals

Understanding TCP/IP Architecture, Encapsulation, ARP & DNS Basics

This article explains the TCP/IP four-layer architecture, detailing each layer’s role, the encapsulation and decapsulation processes, and provides in‑depth coverage of ARP and DNS protocols, including packet structures, Linux commands, and practical packet‑capture examples using tcpdump.

DNSEncapsulationLinux
0 likes · 20 min read
Understanding TCP/IP Architecture, Encapsulation, ARP & DNS Basics
MaGe Linux Operations
MaGe Linux Operations
Jan 25, 2025 · Fundamentals

How DNS Resolves Domain Names: From Browser to IP Address

This article explains the DNS protocol, detailing how domain names are resolved to IP addresses through browser caching, OS queries, recursive lookups involving root, TLD, and authoritative servers, and outlines practical configuration steps for forward, reverse, and high‑availability DNS setups.

DNSDNS configurationDomain Name System
0 likes · 14 min read
How DNS Resolves Domain Names: From Browser to IP Address
Open Source Linux
Open Source Linux
Dec 20, 2024 · Fundamentals

Mastering DNS: The Backbone of Digital Connectivity

This article explains how the Domain Name System (DNS) translates human‑readable domain names into IP addresses through a step‑by‑step process involving recursive resolvers, root servers, TLD servers, and authoritative name servers, highlighting its role in optimizing traffic, caching, redundancy, and load balancing for reliable internet connectivity.

DNSDomain Name SystemIP Resolution
0 likes · 2 min read
Mastering DNS: The Backbone of Digital Connectivity
System Architect Go
System Architect Go
Dec 19, 2024 · Operations

Why Did OpenAI’s New Telemetry Crash Their Kubernetes Cluster?

On December 11, 2024 OpenAI’s Kubernetes cluster suffered a four‑hour outage after a newly deployed telemetry service generated massive API traffic from every node, overwhelming the kube‑apiserver, breaking DNS‑based service discovery, and exposing gaps in control‑plane monitoring and break‑glass mechanisms, prompting critical questions about component behavior and configuration.

API overloadControl PlaneDNS
0 likes · 8 min read
Why Did OpenAI’s New Telemetry Crash Their Kubernetes Cluster?
Efficient Ops
Efficient Ops
Dec 15, 2024 · Fundamentals

Unlocking Network Basics: How VLANs, Routers, and DNS Shape Modern LANs

This article explains the fundamentals of VLANs, single‑arm routing, layer‑3 switches, gateways, DNS, MAC addresses, and subnet masks, using clear analogies and examples to show how network segmentation and routing enable efficient communication within and between local networks.

DNSMAC addressRouting
0 likes · 11 min read
Unlocking Network Basics: How VLANs, Routers, and DNS Shape Modern LANs
Liangxu Linux
Liangxu Linux
Nov 30, 2024 · Operations

Why a New PC Can't Access the Internet: Step‑by‑Step DNS Troubleshooting

A client’s newly purchased computer could connect to the corporate network but could not reach the internet; the guide walks through checking the link light, IP configuration, ping tests, identifying a faulty DNS server, switching to public DNS services, and measuring latency to reveal why foreign DNS isn’t always faster.

CloudflareDNSIP Configuration
0 likes · 5 min read
Why a New PC Can't Access the Internet: Step‑by‑Step DNS Troubleshooting
Liangxu Linux
Liangxu Linux
Nov 10, 2024 · Operations

Mastering DNS Queries with nslookup: 10 Essential Commands

This guide walks you through ten practical nslookup commands for retrieving A, NS, SOA, MX, any, server-specific, reverse, PTR, timeout, and debug DNS records, complete with example syntax and screenshots to help you troubleshoot and verify DNS configurations.

A RecordDNSMX
0 likes · 5 min read
Mastering DNS Queries with nslookup: 10 Essential Commands
Open Source Linux
Open Source Linux
Oct 14, 2024 · Fundamentals

Master DNS Lookups: 10 Essential nslookup Commands Explained

This guide walks you through ten practical nslookup commands for retrieving A, NS, SOA, MX, any, PTR records and more, showing how to adjust timeouts, enable debugging, and query specific DNS servers to troubleshoot and verify domain configurations.

DNSNetworkcommand-line
0 likes · 5 min read
Master DNS Lookups: 10 Essential nslookup Commands Explained
Liangxu Linux
Liangxu Linux
Oct 9, 2024 · Fundamentals

Understanding DNS: Structure, Records, and Query Types Explained

This article provides a comprehensive overview of the Domain Name System (DNS), covering its hierarchical structure, authority delegation, zones, common resource record types, and the three main query methods—recursive, iterative, and reverse—along with step‑by‑step resolution examples.

DNSDomain Name SystemInternet fundamentals
0 likes · 7 min read
Understanding DNS: Structure, Records, and Query Types Explained
Liangxu Linux
Liangxu Linux
Oct 8, 2024 · Operations

Mastering DNS Lookups with nslookup: 10 Essential Commands

This guide explains how to use the nslookup command to retrieve various DNS records—including A, NS, SOA, MX, any, specific server, reverse, PTR, timeout, and debug information—providing clear examples and command syntax for each query type.

DNSDNS Recordscommand-line
0 likes · 5 min read
Mastering DNS Lookups with nslookup: 10 Essential Commands
System Architect Go
System Architect Go
Sep 18, 2024 · Cloud Native

Understanding DNS and Its Configuration in Kubernetes

This article explains the fundamentals of DNS, its role as an application‑layer protocol, and how Kubernetes generates and manages each pod's /etc/resolv.conf through kubelet, covering nameserver, search, ndots options, dnsPolicy choices, and custom dnsConfig examples.

CoreDNSDNSdnsConfig
0 likes · 6 min read
Understanding DNS and Its Configuration in Kubernetes
Liangxu Linux
Liangxu Linux
Sep 16, 2024 · Information Security

Master nslookup on Linux: Install and 7 Essential Commands

This guide shows how to install the nslookup tool on Debian/Ubuntu and CentOS/RHEL systems and provides seven practical usage examples, including querying IP addresses, specifying DNS servers, retrieving specific record types, performing reverse lookups, setting search domains, using the set command, and exiting the interactive mode.

CentOSDNSLinux
0 likes · 5 min read
Master nslookup on Linux: Install and 7 Essential Commands
MaGe Linux Operations
MaGe Linux Operations
Sep 5, 2024 · Operations

Master Linux DNS: From Basics to Advanced BIND9 Configuration

This comprehensive guide explains DNS fundamentals, Linux client configuration, BIND9 server setup, advanced features like DNSSEC and DoH, and essential troubleshooting and security practices, empowering system administrators and network engineers to manage and secure DNS services effectively.

BIND9DNSLinux
0 likes · 11 min read
Master Linux DNS: From Basics to Advanced BIND9 Configuration
Java Tech Enthusiast
Java Tech Enthusiast
Aug 30, 2024 · Operations

Performance Comparison of Major Public DNS Services in China

Testing 150 popular domains from four Chinese cities shows OneDNS public version consistently leads with 9‑19 ms latency, followed closely by Alibaba DNS, while 114DNS, Tencent DNSPod and 360DNS lag behind, prompting users to seek free alternatives as Alibaba’s unlimited service becomes paid.

ChinaDNSNetwork
0 likes · 5 min read
Performance Comparison of Major Public DNS Services in China
Linux Ops Smart Journey
Linux Ops Smart Journey
Aug 29, 2024 · Operations

How to Diagnose and Fix CoreDNS Timeout Issues in Kubernetes

This article explains why CoreDNS may experience DNS resolution timeouts in a Kubernetes cluster, how to analyze logs and timeout settings, locate upstream DNS problems, and apply practical solutions such as adjusting timeout values, switching upstream DNS servers, and deploying a local DNS service.

Cloud NativeCoreDNSDNS
0 likes · 4 min read
How to Diagnose and Fix CoreDNS Timeout Issues in Kubernetes
Tencent Cloud Developer
Tencent Cloud Developer
Aug 15, 2024 · Fundamentals

Understanding the End-to-End Process of a Web Request: IP, DNS, CDN, TCP, Protocol Design, CGI/FastCGI, Server Models, and Database Evolution

The article walks through every stage of a web request—from IPv4 addressing, NAT, and DNS resolution through CDN proximity and TCP stream handling, to HTTP framing, CGI versus FastCGI processing, stateless versus stateful server models, and finally database scaling techniques such as sharding and Redis caching.

CDNCGIDNS
0 likes · 21 min read
Understanding the End-to-End Process of a Web Request: IP, DNS, CDN, TCP, Protocol Design, CGI/FastCGI, Server Models, and Database Evolution
MaGe Linux Operations
MaGe Linux Operations
Aug 11, 2024 · Operations

Master nslookup on Linux: Install, Commands, and Practical Tips

This guide explains how to install the nslookup tool on various Linux distributions and demonstrates seven common usages—including querying IP addresses, specifying DNS servers, retrieving specific record types, performing reverse lookups, setting search domains, using interactive set commands, and exiting the tool—to help diagnose DNS issues effectively.

DNSLinuxNetwork Tools
0 likes · 5 min read
Master nslookup on Linux: Install, Commands, and Practical Tips
Alibaba Cloud Observability
Alibaba Cloud Observability
Jul 31, 2024 · Information Security

Unlock DNS Log Insights: Detect Threats, Optimize Performance, and Master Cloud‑Native Auditing

This article explains how DNS logs serve as a foundation for network monitoring, security auditing, and performance troubleshooting, covering DNS parsing, record types, log‑audit integration with Alibaba Cloud SLS, practical query examples, and advanced analysis techniques for detecting anomalies and attacks.

Alibaba CloudDNSSLS
0 likes · 25 min read
Unlock DNS Log Insights: Detect Threats, Optimize Performance, and Master Cloud‑Native Auditing
MaGe Linux Operations
MaGe Linux Operations
Jul 30, 2024 · Fundamentals

How DNS Works: From Domain Names to IP Addresses Explained

This article explains the DNS system, its hierarchical structure, the roles of root, TLD, and authoritative servers, common resource record types, and the three kinds of DNS queries—recursive, iterative, and reverse—illustrated with examples and diagrams.

DNSDomain Name SystemInternet fundamentals
0 likes · 6 min read
How DNS Works: From Domain Names to IP Addresses Explained
MaGe Linux Operations
MaGe Linux Operations
Jun 26, 2024 · Cloud Native

How Headless Services Enable Direct Pod Access in Kubernetes

This article explains what headless services are, how they differ from regular Kubernetes services, their DNS‑based discovery mechanism, practical examples with OpenLDAP and Kafka Zookeeper, and how to include unready pods using annotations, providing a comprehensive guide for stateful workloads.

DNSHeadless Servicekubernetes
0 likes · 14 min read
How Headless Services Enable Direct Pod Access in Kubernetes
Qunar Tech Salon
Qunar Tech Salon
Jun 21, 2024 · Cloud Native

Redesigning Kubernetes DNS Architecture with q-dnsmasq for Improved Reliability and Performance

This article details the motivation, design, implementation, testing, and rollout of a refactored Kubernetes DNS solution that replaces the default kube-dns → CoreDNS chain with a node‑local q‑dnsmasq cache and parallel upstream queries to achieve higher availability, faster resolution, and better cache hit rates in large‑scale clusters.

CoreDNSDNSDnsmasq
0 likes · 18 min read
Redesigning Kubernetes DNS Architecture with q-dnsmasq for Improved Reliability and Performance
IT Niuke
IT Niuke
Jun 2, 2024 · Backend Development

Why You Still Need Nginx Even When Using Tomcat

The article analyzes the limitations of deploying web services with Tomcat alone—such as DNS IP caps, scaling costs, lack of health checks, static file handling, and release downtime—and demonstrates how Nginx’s reverse‑proxy, health‑check, and virtual‑host features overcome these issues with concrete configuration examples.

DNSNGINXReverse Proxy
0 likes · 11 min read
Why You Still Need Nginx Even When Using Tomcat
Open Source Linux
Open Source Linux
May 26, 2024 · Fundamentals

What’s the Real Difference Between localhost and 127.0.0.1?

This article explains the subtle distinctions between the hostname localhost and the IPv4 loopback address 127.0.0.1, covering their definitions, resolution processes, performance impact, IPv6 considerations, practical usage scenarios, and best‑practice recommendations.

127.0.0.1DNSIPv6
0 likes · 6 min read
What’s the Real Difference Between localhost and 127.0.0.1?
Cloud Native Technology Community
Cloud Native Technology Community
May 23, 2024 · Cloud Native

Kubernetes Service Network Mechanisms: Overview, Access Methods, Container Networking, Service Types, DNS, kube-proxy Modes, Source IP Preservation, and Ingress

This article provides a comprehensive guide to Kubernetes Service networking, covering container network models, intra‑ and inter‑node pod communication, Service‑Pod relationships, Service types (ClusterIP, NodePort, LoadBalancer, ExternalName), CoreDNS resolution, kube‑proxy operating modes, source IP preservation strategies, and Ingress handling.

CloudNativeDNSIngress
0 likes · 27 min read
Kubernetes Service Network Mechanisms: Overview, Access Methods, Container Networking, Service Types, DNS, kube-proxy Modes, Source IP Preservation, and Ingress
Open Source Linux
Open Source Linux
May 23, 2024 · Information Security

Master Common Web & Network Attacks: SQL Injection, XSS, CSRF, DDoS & More

This article provides a comprehensive overview of prevalent web and network security threats—including SQL injection, XSS, CSRF, file‑upload flaws, DDoS, ARP/RARP spoofing, DNS attacks, routing protocols, TCP/UDP differences, HTTP nuances, cookies vs. sessions, and SSL/TLS—along with practical prevention techniques for each.

CSRFDDoSDNS
0 likes · 24 min read
Master Common Web & Network Attacks: SQL Injection, XSS, CSRF, DDoS & More
Liangxu Linux
Liangxu Linux
May 14, 2024 · Fundamentals

Mastering DNS with BIND: Step‑by‑Step Server Setup and Configuration

This guide explains the fundamentals of the Domain Name System, describes DNS server roles and query types, and provides detailed, Linux‑based BIND installation and configuration steps—including zone files, network settings, service management, and testing procedures.

BINDDNSDomain Name System
0 likes · 9 min read
Mastering DNS with BIND: Step‑by‑Step Server Setup and Configuration
Java Tech Enthusiast
Java Tech Enthusiast
May 4, 2024 · Fundamentals

Understanding HTTP and TCP: From URL to Browser Rendering

The article walks through every step from typing a URL to final page rendering, detailing URL parsing, DNS lookup, TCP three‑way handshake and termination, HTTP request/response structure, congestion and flow control mechanisms, and the browser’s DOM, CSS, layout and painting processes.

DNSFour-way HandshakeHTTP
0 likes · 13 min read
Understanding HTTP and TCP: From URL to Browser Rendering
Cloud Native Technology Community
Cloud Native Technology Community
Apr 24, 2024 · Cloud Native

Implementing Global Server Load Balancing with k8gb: A DNS‑Based GSLB Solution for Multi‑Cluster Kubernetes

This article explains the challenges of load balancing traffic across multiple Kubernetes clusters, reviews the shortcomings of commercial, public‑cloud, Karmada, and simple DNS approaches, and details how the open‑source k8gb project uses DNS and CoreDNS to provide an automated, cloud‑native GSLB solution with failover and multi‑cloud support.

DNSGSLBk8gb
0 likes · 9 min read
Implementing Global Server Load Balancing with k8gb: A DNS‑Based GSLB Solution for Multi‑Cluster Kubernetes