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Monday, August 21, 2017

Asterisk Configuration Guide

The configuration guide for Asterisk PBX is a self-training material for the Digium's award winning open source software. With 370 pages and 15 chapters is one the most complete guides for...

Set Up DKIM (DomainKeys Identified Mail) Working With Postfix On CentOS Using OpenDKIM

This tutorial shows how to get DKIM working on a CentOS box running Postfix using OpenDKIM, I'll also cover some simple trouble shooting tips and advice for future upgrade on your...

How to Log Linux IPTables Firewall Dropped Packets to a Log File

This article is part of our ongoing Linux IPTables series of articles. When things are not working as expected with your IPTables rules, you might want to log the IPTables dropped...

Linux IPTables: How to Add Firewall Rules (With Allow SSH Example)

This article explains how to add iptables firewall rules using the “iptables -A” (append) command. “-A” is for append. If it makes it easier for you to remember “-A” as add-rule (instead...

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...

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