Before moving to this, you must have the basics of CSF. CSF, is the abbreviation of Config Server Security & Firewall. CSF is for configuring or managing your server firewall easily. CSf is the most commonly using firewall application to…
Tag: Security
Will restarting csf (csf -r) remove already defined custom iptables rules ?
Yep, it will! If you have a custom iptable rule defined in a CSF installed server, it may works, but restarting the CSF (csf -r) will remove the rule. CSF is one of the best free iptables managing tool for Linux…
CVE-2014-6271: remote code execution through bash – Critical BASH vulnerability discovered
Critical BASH vulnerability discovered – update BASH on your CentOS Linux server!!! ## Shellshock vulnerability..!! Summary >> A critical code execution vulnerability (Remote) affecting bash (Unix shell) has been discovered on September 24, 2014. >> The vulnerability occurs because bash…
Allow and Deny IP addresses on server using APF
It’s a useful option to protect the server from unwanted/unauthorized connections. By using basic iptables we can allow/deny IPs, but it’s not such simple. The applications like CSF or APF will help us to do the same simply using simple…
[Solved] Open SSL Heartbleed vulnerability – A complete check and fix
In this time, we all are aware about the new Open SSL Heartbleed vulnerability. The Heartbleed bug allows anyone on the Internet to read the memory of the systems protected by the vulnerable versions of the OpenSSL software. You will get…
How/Steps to install fail2ban on CentOS 5.x, 6.x Rhel 5.x, 6.x – Protect SSH/FTP using fail2ban
Fail2ban, it is a security based application for your Unix based server. The fail2ban service is commonly used to protect your SSH and FTP from unauthorized connection. Here I am explaining the installation and basic configurations steps of fail2ban service…
How to audit linux server security with Lynis
Server security has an impotent role in web-hosting industry and also it somewhere difficult to manage. Lynis is a tool for managing the server security concern easily. Here I am going to explain the installation and usage of Lynis tool…