What is Port Knocking?

Posted at February 27, 2017 at 6:48 pm by Jithin

In this tutorial we can check What is Port Knocking? Security is one of the most important parameter that should be kept in account when you are on a hosting account. There are many security measures that can be used to ensure your server is secure. There are different methods to implement the security. You could secure the website and the whole server. Port knocking is a technique used to secure your server. If you own a VPS or a dedicated server, using port knocking is a good idea to ensur   [...]

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How to Open a Port in CSF Firewall? ( cPanel )

Posted at October 14, 2016 at 3:58 pm by Jithin

What is a port A port is a process-specific or an application-specific software construct serving as a communication endpoint. It is used by the transport layer protocols of the Internet Protocols suite such as UDP and TCP. The term port is also used in the hardware devices. They are the physical setup of the systems to get connected with another hardware media. Here, we are going to see about the logical construct that identifies a specific process or network service. An IP address and a pro   [...]

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How to Troubleshoot a DDoS Attack?

Posted at September 8, 2016 at 6:28 pm by Jithin

What is a DDoS attack? DDoS stands for Distributed Denial of Service. It is a variant of the infamous DoS attack. A DoS attack is a type of attack that the attackers stops the service so that the legitimate users also cannot access the service.The attack will be from a single computer system. This is achieved by sending excessive connection requests to a web server. Every server will have a limit on number of requests that can be handled at a time. When the number of requests exceeds this li   [...]

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Details about APF and BFD with examples

Posted at August 22, 2016 at 11:02 am by Jithin

Advanced Policy Firewall (APF) is an iptables based firewall framework that is anything, but difficult to set up and control. It always works as one with Brute Force Detection (BFD). BFD is a measured shell script for parsing application logs and checking for verification disappointments. It does this by utilizing a standards framework where an application particular alternatives are put away. This includes customary expressions for every remarkable auth position. Together, they give a straig   [...]

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Best Security tools and usage in Plesk

Posted at August 22, 2016 at 10:31 am by Jithin

Security is the utmost priority of any systems. Data loss and malicious attacks can ruin your site, so security is vital. There are advanced security tools in Plesk besides the basic security settings, which can enhance the security levels.   Fail2Ban: Protect Your Server from Brute Force Attacks Fail2Ban is an automated protection for the server from the brute force attacks. It checks the log files for the pattern of authentication failures, seeking for exploits, and other entries tha   [...]

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APF Common Commands with Examples

Posted at January 1, 2016 at 2:49 pm by Jithin

In this documentation, we can check APF common commands with examples.   1) Stop APF. apf -f root@localhost [/usr/src/apf-9.7-2]# apf -f eth0: error fetching interface information: Device not found apf(9587): {glob} flushing & zeroing chain policies apf(9587): {glob} firewall offline root@localhost [/usr/src/apf-9.7-2]#   2) Start APF. apf -s root@localhost [/usr/src/apf-9.7-2]# apf -s apf(9773): {glob} activating firewall apf(9821): {glob} could   [...]

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APF Installation and Configuration

Posted at January 1, 2016 at 2:48 pm by Jithin

In this documentation, we can check how to install APF  on your server and its configuration. Advanced Policy Firewall (APF) is use to secure servers and workstations connected to the network.   INSTALLATION 1) Go to the directory “/usr/src/”. root@localhost [~]# cd /usr/src/ root@localhost [/usr/src]#   2) Download the APF. wget http://www.rfxn.com/downloads/apf-current.tar.gz   3) Extract the APF tar file. tar xvzf apf-current.tar.gz   4) Go to A   [...]

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