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coolvds.com › Blog › Server Administration

Building a Bulletproof Postfix Mail Server on Linux (2011 Edition)

· CoolVDS Team

Stop relying on shared hosting for critical email. This guide covers the essential Postfix configuration steps to ensure deliverability, secure your MTA against relays, and keep the Norwegian Data Inspectorate happy.

coolvds.com › Blog › DevOps & Infrastructure

Stop Praying for Uptime: Bulletproof Load Balancing with HAProxy

· CoolVDS Team

Discover how to scale your infrastructure using HAProxy on Linux. We dive into configuration strategies, session persistence, and why hardware isolation matters for high-traffic Norwegian sites.

coolvds.com › Blog › Server Administration

OpenVZ Containers: The Hidden Cost of "Cheap" Virtualization in 2011

· CoolVDS Team

Is your budget VPS slowing down during peak hours? We dissect the architecture of OpenVZ, expose the dangers of 'Burst RAM', and explain why hardware virtualization like Xen or KVM is the only viable path for mission-critical Norwegian businesses.

coolvds.com › Blog › Server Administration

Lockdown 2011: The Definitive Guide to Linux Server Hardening

· CoolVDS Team

In an era of rising hacktivism, default Linux installs are not safe. Learn the battle-tested strategies to secure your CentOS and Debian servers, from iptables to kernel hardening, tailored for the Norwegian hosting market.

coolvds.com › Blog › Server Administration

Stop Analyzing iowait: Why Local SSD Storage is the Only Upgrade That Matters in 2011

· CoolVDS Team

Is your server load spiking while CPU usage sits idle? You are likely a victim of the 'IO Bottleneck' common in traditional SAN setups. We explore why switching to local SSD storage and KVM virtualization is the critical move for serious systems administrators in Norway.

coolvds.com › Blog › Performance Optimization

PHP-FPM and Nginx: Crushing Load Averages on High-Traffic Portals

· CoolVDS Team

Is Apache with mod_php eating your RAM? We break down the transition to Nginx + PHP-FPM on CentOS 6, optimizing process managers for maximum throughput and explaining why I/O performance is the hidden bottleneck.

coolvds.com › Blog › Server Administration

Paranoid Penguin: 5 Essential Steps to Harden Your Linux VPS in 2011

· CoolVDS Team

Script kiddies are scanning your IP right now. Stop relying on default configs. Here is the battle-tested guide to locking down CentOS 6 and Debian servers, securing SSH, and configuring iptables for Norwegian infrastructure.

coolvds.com › Blog › Security & Compliance

Lock Down Your Linux Box: Essential Server Hardening for 2011

· CoolVDS Team

Default installations are dangerous. From securing SSH to configuring iptables and Fail2Ban, here is the battle-tested guide to hardening your Linux VPS against brute-force attacks and exploits.

coolvds.com › Blog › Hosting Solutions

VPS vs Shared Hosting in 2011: Stop Sharing Your CPU With Strangers

· Georgi Dimitrov

Is your site crawling during peak hours? Shared hosting is a trap for growing businesses. We break down the technical differences, from kernel isolation to I/O wait times, and explain why upgrading to a VPS in Oslo is critical for performance and Norwegian compliance.

coolvds.com › Blog › Server Administration

OpenVZ vs. KVM/Xen: Why Your "Cheap" VPS is Actually Costing You Money

· CoolVDS Team

In the battle of virtualization technologies, OpenVZ offers density while KVM and Xen offer isolation. We dissect the 'user_beancounters' file, expose the risks of overselling, and explain why serious Norwegian businesses are migrating to hardware virtualization in 2011.

coolvds.com › Blog › Server Administration

IPv4 is Dead: A Battle-Hardened Guide to Native IPv6 Deployment

· CoolVDS Team

IANA officially ran out of IPv4 blocks in February. If you aren't dual-stacking now, your infrastructure is already obsolete. Here is the raw, terminal-level guide to deploying IPv6 without breaking your uptime.

coolvds.com › Blog › Server Administration

OpenVZ vs. KVM: The Truth About "Burst RAM" and Overselling in 2011

· CoolVDS Team

Is your VPS actually dedicated? We analyze the architecture of OpenVZ containers, the hidden dangers of /proc/user_beancounters, and why true hardware isolation matters for your Norwegian business infrastructure.

coolvds.com › Blog › Security & Compliance

Paranoia is a Virtue: The 2011 Linux Server Hardening Guide

· CoolVDS Team

The 'LulzSec summer' proved no one is safe. From iptables policies to SSH key management, here is how to lock down your Norwegian VPS before you even point a domain at it.