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Block porn using free DNS

Today just see some ads about positive internet on my cable channel. Despite the controversy last  time because our goverment is blocking Vimeo,  i support their effort to make internet safer and positive (don’t take it the same with internet censorship). Beside using Nawala DNS you guys can also use OpenDNS Family Shield which is freely available. To configure your Mac OS …

Install email certificate on OS X

Email certificate is one way to digitally sign emails and make sure your email stay secure plus makes sure that the email and attachments content actually came from you. Whenever anyone edit the content of your mail, the recipient will be alerted that the email is being compromised. Here’s we will see how to install the email certificate on Mac …

How to chroot ssh user using Jailkit

Jailkit is a set of utilities to limit user accounts to specific files using chroot() and or specific commands. Jailkit is known to be used in network security appliances from several leading IT security firms, internet servers from several large enterprise organizations, internet servers from internet service providers, as well as many smaller companies and private users that need to secure …