Security Awareness : WannaCrypt ransomware attack

    You maybe aware of the recent cyber attack affecting millions of computer systems throughout the world due to a vulnerability in the SMB/CIFS protocol on Windows operating systems. These attacks known as ransomware, encrypt files of the target system making them inaccessible to the user before demanding payment in return for decrypting the files. For […]

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CSF commands for Unix/Linux servers

CSF commands for managing your server firewall. 1. Enable csf and lfd if previously disabled csf -e Or csf –enable 2. Disable csf and lfd completely csf -x Or csf –disable 3. Restart firewall rules csf -r Or csf –restart 4. Start the firewall rules csf -s Or csf –start 5. Flush/Stop firewall rules (Note: […]

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Introduction and basic usages of iptables under Unix/Linux

* What is iptables in Linux ?  Iptables is a rule based firewall system and is normally pre-installed on a Unix operating system which is controlling the incoming and outgoing packets. Basic structure of iptables The structure for the iptables is like, Tables which has chains and the chains which contains rules. Tables —> Chains […]

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