There are scenarios where we need to know what applications or services on macOS have internet connection. Whether we want to detect an application that uses an internet connection in an unjustified way to transfer sensitive data from Mac, either we want to set certain rules in a firewall or we want to limit them… Read More
The most secure connection to a remote server is through an SSH (Secure Shell) cryptographic network protocol. A common problem encountered by server administrators or those who make connections via SSH via Terminal or Putty, is the sudden disconnection from the session with the message: "client_loop: send disconnect: Broken pipe". Most… Read More
Locking files and folders is especially useful in the scenario where on an operating system macOS several users are present. The "locked" mode for files and folders is designed to prevent editing / editing of sensitive files. This is a special "permission", somewhat similar to "Read Only" in Windows, but it's much better… Read More
It's not a very stressful thing, but for some users who work frequently in Terminal on macOS / OS X, displaying the name Macand username take up space on the command line. The first line that appears when we open the Terminal is informative. Displays the date on which the last login on the system took place. ... Read More
When we authenticate to remote servers using the Terminal application in macOS, after SSH authentication, we receive the following error message: warning: setlocale: LC_CTYPE: cannot change locale (UTF-8): No such file or directory The error is not serious and is not returned by the server we logged on to. It is returned by… Read More
Though discussions both here and on several forums about the fact that the new macOS Sierra, private keys are no longer stored in the Keychain after restartarea of the system. For server administrators, who use a secure SSH connection with an authentication key, this is a bit annoying. Every time I want to log in via… Read More
Server administrators / developers owners iMac or MacBookThey had a little surprise after the launch of the new macOS Sierra.DSS SSH Keys used for passwordless authentication on servers or other systems that require privatekeys / publickeys are no longer retained in macOS Sierra, which comes with openSSH 7. Even if the key was added, after… Read More
With the release of OS X El Capitan, Apple has also introduced a novelty in terms of security and protection of OS X operating systems, in the face of malware or other types of viruses that target the modification of system files. System Integrity Protection (SIP), also known as Rootless Mode, reduces vulnerabilities and the possibility that… Read More