May 8, 2017
Useful Firewall Rules to Configure and Manage Firewall in Linux
Firewall/Iptables/Security,Managing network traffic is a critical aspect of any organization and a tricky job for system administrators. Knowing what traffic to allow and what to block can be a matter of being safe or vulnerable to cyber-attacks. A firewall is a tool built to aid system administrator’s in regulating incoming and outgoing traffic. System administrators…
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April 19, 2017
403 Forbidden Error – Causes and Fixes
Linux General,You spend months, working day in and out coding your website and it is finally time to test it. You type the URL of the website in a browser and hit enter, only to be slapped back with a 403 Forbidden error. This will be very frustrating for a web designer. 403 Forbidden error is…
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April 7, 2017
Five ways to optimize your Nginx server
Nginx,Nginx is an open-source HTTP(web) server and reverse proxy, and an IMAP/POP3 proxy server (email server). It was developed to tackle the C10K problem that web servers in use at the time, which was largely Apache, were facing. C10K is simply a numeronym that stands for concurrently handling 10000 connections. Nginx was designed with the…
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March 30, 2017
High Memory Usage in SQL – How to avoid it?
SQL Server,When your system is short of memory, MySQL will be killed by the system itself since it can use a lot of memory. This also causes MySQL servers to face high server load. Usually when MySQL is killed, we get the message “mysqld invoked oom-killer”. In such cases it is always advisable to restart the…
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March 8, 2017
4 best practices to follow to keep your customers happy
Outsource technical support,outsourced customer support,outsourced web hosting support,Keeping your customers happy is the key to this competitive technology-savvy world that we live in. One negative review /comment /opinion on social media about customer service can spread like a forest fire and break your reputation. Mindsets & rules for thinking can dependably guide you to the correct decision, every time towards the customer.…
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February 25, 2017
How to use layered security to safeguard your server?
HTTP/WebServer,Well most of us in today’s scenario talk about “defense in depth” or “layered security”. Though they are used interchangeably, they are very separate from each other. Nowadays, building just one level of security to safeguard your server could have devastating consequences down the line. While attackers may easily penetrate the first level of defense,…
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February 6, 2017
E-mail Authentication
Linux General,Introduction: We all send Email on our day to day life, We send mails from our Email client (Outlook, Thunderbird ) or from a Web interface (From browser), the mails gets transferred to the recipient. The question is, how secure is our message transfer. What is happening at the background. How the messages that we…
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August 19, 2016
APACHE PHP-FPM MOD_FASTCGI
Linux General,Here is a guide to install Apache with PHP-FPM(PHP-FastCGI Process Manager) and mod_fastcgi Apache PHP-FPM is an alternative implementation of PHP-FastCGI. In PHP-FPM the PHP process runs as a standalone without the need of web server. It listens for incoming requests on either a TCP or a Unix socket. The web server we use(apache in…
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July 11, 2016
Find open ports on the Linux server using a script
Linux General,Find open ports on the Linux server using a script Create a .sh file with below script and set execute permission for the scrip file. #vi portscan.sh #!/bin/bash #The port numbers PORT1=21 #ftp PORT2=22 #ssh PORT3=25 #smtp PORT4=53 #dns PORT5=80 #http PORT6=110 #POP3 PORT7=143 #IMAP PORT8=443 #https PORT9=1433 #MSSQL PORT10=3306 #MYSQL PORT11=3389 #Microsoft-RDP PORT12=5432 #PostgreSQL…
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March 5, 2016
Routing protocol commands list
Network,CCNA Routing Protocol Commands IP ROUTING #sh ip route // To view IP routing tables created on a Cisco router. Static Routing Routers are manually configured for networks that are not directly connected, to be able to route to all networks via the next-hop interface. Syntax: (config)#ip route 192.168.10.0 255.255.255.0 192.168.20.2 (config)#no ip route 192.168.30.0…
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