Allowing Secured Shell (SSH) remote login is a security risk for your system as it open up your computer to a host of malicious activities. One way to reduce the risk is to disallow root login from SSH, but that is not enough if there are a lot of users in your system and you […]
MySQL service port are not meant to be accessible to the outside world as it would become a security concern to the administrator. Although MySQL server (mysqld) by itself has a built-in mechanism to deny access from unauthorized ip-address, it still does not protect it from being overwhelmed by multiple malicious requests or buffer overflow […]
sudo is probably the most used command in Ubuntu. In this post, I will show you how to make ‘sudo’ display funny and humorous error messages in Ubuntu Linux. To do that, you would only need to edit the /etc/sudoers : sudo nano /etc/sudoers Then find the line that starts with Defaults env_reset, add insults […]
Rainbow tables is a form of attack method used to crack stored cryptographic hashes commonly used as passwords in various application. It is similar to brute-force and dictionary attack that it will try to compare the resulting hash with the hash it attempts to crack, except in Rainbow tables, the possible matching hashes are all […]
I previously blogged about how to mine bitcoin in Ubuntu Linux using appropriate GPU. However, here are the video of professional bitcoin mining rigs used to generate bitcoin. The combine GPU processing power is capable of processing up to 48 Gigahash/sec! There are also mining rigs available for purchase from BitcoinRigs.com Further reading: Bitcoin Mining […]
Fcrackzip is a tool that can be used to crack zip files encrypted with ZipCrypto algorithm through dictionary-based and brute-force attack. The brute force attack can be configured to use the combination of lower,upper, numerical characters or with other symbols or punctuation marks. Example usage: fcrackzip -u -v -l 1-6 -c a example.zip fcrackzip -u […]