Ran IPTables Flush? How To Regain SSH Access After Being Locked Out Of CSF Firewall Servers

Centmin Mod Tips

You’ve accidentally run the SSH command iptables -F and have locked yourself out of your server and can not SSH login again. So how do you regain SSH access? Centmin Mod LEMP stack uses CSF Firewall which is a wrapper interface to CentOS system’s underlying IPTables. If you run the SSH command, iptables -F you may end up locking yourself out of the server as this command flushes all the existing IPTable rules that are configured and setup by CSF Firewall at startup. This guide will outline ways you can possibly regain SSH access using example VPS providers – Upcloud, DigitalOcean, Vultr, Linode, Hetzner and Amazon AWS EC2 instance servers.

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Centmin Mod vs Easyengine vs Webinoly vs VestaCP vs OneInStack LEMP Stack Benchmarks

HTTP/2 HTTPS

Made use of ssdnode’s 4 CPU KVM VPS with Ubuntu 18.04 LTS and LXD containers to create several LXD containers to compare several CentOS and Ubuntu LEMP stacks, Centmin Mod, EasyEngine, Webinoly, VestaCP and OneInStack. The bnchmark compare Nginx non-HTTPS and HTTP/2 HTTPS based performance.

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How To Install WordPress On Centmin Mod LEMP Stack Guide

Autoptimize Wordpress Plugin

This blog post was migrated from ServerManage.guide. This WordPress site was created using Centmin Mod’s centmin.sh menu option 22 automatic WordPress installer routine and hosted on a Upcloud.com KVM VPS server running Centmin Mod Nginx, PHP-FPM, MariaDB MySQL on CentOS 7 64bit server paired with Cloudflare free plan.

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Centmin Mod Advanced Customised Installation Guide

Centmin Mod Nginx

The initial Centmin Mod install guide and the Getting Started guide outline the normal way of installing Centmin Mod LEMP stack on CentOS 7.x 64bit based server. However, there’s additional steps you can do to further customise your Centmin Mod LEMP default out of the box configuration and to enable additional optional features.

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WordPress 7 Site Updates

blitz.io

This blog post was migrated from old wordpress7.centminmod.com site prior to it’s closure. This WordPress 7 site has switched to a new WordPress theme and look. The WordPress 7 site is for testing CentOS 7.2 with latest PHP 7 (currently using PHP 7.0.9) via Centmin Mod LEMP stack’s WordPress auto installer for Nginx. Re-ran my …

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PHP 7.0.1 + Redis Cache for WordPress

PHP 7.0.1 + Redis Cache for Wordpress

This blog post was migrated from old wordpress7.centminmod.com site prior to it’s closure. Today updated this blog’s Centmin Mod LEMP stack PHP-FPM to PHP 7.0.1 with added PHP Redis PHP Extension support and enabled Nginx level Redis caching + Redis Object Caching. The switch from WordPress Super Cache plugin to this WordPress Redis caching combination will result in much faster site for this 2GB DigitalOcean KVM VPS. Below are the results for Blitz.io & Loader.io both with 10,000 user benchmark stress test for this blog.

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WordPress Super Cache Benchmark – Locust IO Load Testing

Wordpress Super Cache Benchmark - Locust IO Load Testing

This blog post was migrated from old wordpress7.centminmod.com site prior to it’s closure. WordPress Super Cache benchmark and load testing continues. I came across Locust load testing tool which is an open source Python based load testing tool which allows distributed master and slave load testing against a target web site (this blog). I setup a master & slave Locust load tester server cluster with 2 dedicated servers I have – Las Vegas, Nevada Intel Xeon E3-1240v3 32GB, 250GB SSD server as master Locust server and a Montreal, Canada Intel Xeon Xeon E3-1245v2 32GB, 3x120GB SSD server as slave.

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WordPress Super Cache Benchmark – Siege http load testing

Wordpress Super Cache Benchmark - Siege http load testing

This blog post was migrated from old wordpress7.centminmod.com site prior to it’s closure. Running more load testing benchmarks against this blog for WordPress Super Cache benchmarks. This time using Siege http load testing tool. Centmin Mod LEMP web stack installer already includes installation of Siege benchmark tool by default, so makes testing quite easy. You would need to run Siege benchmark tool from a separate server from the target test web server/site you want to test as Siege uses server resources itself (cpu and memory).

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