What is Port Knocking?

By | 2017-02-27T18:48:26+00:00 February 27th, 2017|

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 [...]

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

By | 2016-10-14T15:58:39+00:00 October 14th, 2016|

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 [...]

How to Troubleshoot a DDoS Attack?

By | 2018-08-12T16:15:43+00:00 September 8th, 2016|

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 [...]

Details about APF and BFD with examples

By | 2018-08-28T17:38:35+00:00 August 22nd, 2016|

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 [...]

APF Common Commands with Examples

By | 2016-01-01T14:49:04+00:00 January 1st, 2016|

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 [...]

APF Installation and Configuration

By | 2016-01-01T14:48:27+00:00 January 1st, 2016|

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 [...]