Tag: linux administration

As you may know, there are two kinds of email systems: Outlook, and everything else. The non-Outlook-based email world consists mainly of three kinds of software: MDAs, MUAs, and anti-spam/antivirus. Dovecot is the glue between your MDA and your MUA.[gview file=”https://blog.learningtree.com/wp-content/uploads/pdf/dovecot-email-flow.pdf”] MDAs are the mail delivery agents, such as SendMail, PostFix, OpenSMTPD, and more. An […]

When you are inventorying network services as part of a security audit, make sure that you find all your hidden services! I don’t mean a hidden server as with the so-called “Deep Web”, something only accessible through Tor, but instead a network service that you might overlook on a known server. I was reminded of […]

Security > Certification + Compliance Certification and compliance can play a role in security.  They might be part of security, but there is no guarantee that they can provide it. Put another way, they might be necessary, at least for regulatory reasons, but they are not adequate on their own. Passing a certification exam proves […]