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Monday, August 21, 2017

IPTables Flush: Delete / Remove All Rules On RedHat and CentOS Linux

On Red Hat based Linux, iptables comes with certain default rules. It is good idea to clean them up, and start from scratch. This article is part of an ongoing iptables tutorial...

Linux Firewall Tutorial: IPTables Tables, Chains, Rules Fundamentals

iptables firewall is used to manage packet filtering and NAT rules. IPTables comes with all Linux distributions. Understanding how to setup and configure iptables will help you manage your Linux firewall...

Iptables rules

# Modify this file accordingly for your specific requirement. # pcguide.vn # 1. Delete all existing rules iptables -F # 2. Set default chain policies iptables -P INPUT DROP iptables -P FORWARD DROP iptables -P OUTPUT DROP # 3....

25 Most Frequently Used Linux IPTables Rules Examples

At a first glance, IPTables rules might look cryptic. In this article, I’ve given 25 practical IPTables rules that you can copy/paste and use it for your needs. These examples will act as...

Nginx Vs Apache: Nginx Basic Architecture and Scalability

The need for serving large number of concurrent requests is raising every day. The prediction of C10K problem (i.e 10,000 concurrent clients) started the research on web server architecture which could...

How to Configure Nginx to Execute PHP Using PHP-FPM

Nginx is pronounced as “Engine-X”, which is a web server and reverse proxy server. Nginx is well known for its speed and ability to handle large number of requests simultaneously with...

How to Setup Nginx Reverse Proxy to Apache/PHP on Linux

Nginx can be used as a front-end to an Apache/PHP website. For this, we need to setup Nginx as a reverse proxy. For example, let us say we have an enterprise application...

High-Availability Storage with GlusterFS on CentOS 7 – Mirror across two storage servers

This tutorial shows how to set up a high-availability storage with two storage servers (CentOS 7.2) that use GlusterFS. Each storage server will be a mirror of the other storage server,...

Extend or increase LVM Partition’s size using lvextend command

Resizing the file system size is an important task of Linux admin’s profile. In Linux , LVM(Logical Volume Manager) provides the facility to increase and reduce the file system size. In...

Extend LVM partition size when there is no free space in the Volume Group

There are some cases when we want to extend the size of LVM partition but if there is no free space available in the Volume group , then first we have...

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