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To make settings for a specific group of users or enrolled Chrome Browsers, put the user accounts or browsers in an organizational unit. To apply settings for Chrome Browser users on Windows, Mac, or Linux computers, turn on Chrome Browser management for the organizational unit that they belong to. See Turn on Chrome Browser management. If you run an unsigned app that is not listed in the firewall list, a dialog appears with options to Allow or Deny connections for the app. If you choose Allow, OS X signs the application and automatically adds it to the firewall list. If you choose Deny, OS X adds it to the list but denies incoming connections intended for this app. Jul 08, 2016 How to access your Chrome apps without the apps launcher Google plans to remove the Chrome Apps Launcher from Chrome for Windows, Mac, and Linux in July. Luckily, there's a workaround. However, on OS X and and Excel for Mac, you have to first grant Excel permission to access the file, then select the file to grant access to, and then dismiss a warning that the file may be harmful. Is there a way to adjust settings in OS X and/or Excel to allow for the file to be opened with a single click, without all the additional steps? Enable Back To My Mac in the iCloud preference pane. Now, when you’re connected to the internet on your local network or anywhere else, you see your other computer in the list of Devices in the.
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␡- User Accounts and Access Control
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This chapter is from the book Mac OS X Security
This chapter is from the book
This chapter is from the book
User Accounts and Access Control
One of the driving principles of information security is the idea of Least Privilege. Least Privilege is the concept that an entity should be given only the fewest possible rights to perform its required activity and no more. For instance, if a user only needs to surf the Internet, he does not need the capability to change the system's IP address or add new users. By giving a user more access than he requires, you are opening the door to, at the very least, system instability and possibly security compromises. Unfortunately, most modern operating systems were not designed from the ground up to adhere to Least Privilege. Usability and extensibility won the day. Locking down users to a small subset of commands is a difficult job. Thinking about what your users need to accomplish and being diligent with systems configuration will drive up the security of your systems.
When Mac OS X is first installed on a host, a user is created with administrator privileges. This user has a great deal of control of the workstation, either directly through the various System Preferences panes or through other mechanisms such as sudo. Mac OS X attempts to limit the direct access this administrative user has by requiring an administrative password be supplied when an especially sensitive activity is performed. For example, when installing a third-party application that needs to modify your network stack, Mac OS X will launch an authentication screen to verify the activity. When launching commands through the Terminal program sudo, you are prompted for a password as well.
However, there are still a great number of activities that an admin user can perform that you may not want to allow everyone to do. Mac OS X comes with a robust user creation utility that allows you to have a reasonable amount of control over what users can and cannot do. If someone other than yourself will use your host, for example, a coworker or relative, it is advisable to create a user account specifically for that person which grants only the access they require.
Role Accounts
A role account is an account that multiple people use to gain access to a host. Role accounts are common in an office environment where a group of individuals require the same type of access. For example, everyone in finance may use the finance account to connect to an ftp server. Although this simplifies account management, it makes tracking illicit use very difficult. Every person accessing a system should have his or her own unique account. This provides a more complete audit trail for you to examine when something bad happens to the machine.
The Users tab in the Accounts System Preferences pane controls all user accounts on the system. Adding a new user is as simple as clicking New User and filling in all the required fields (see Figure 3.8). Dit software mac app download. The Name field is what is commonly known in the UNIX world as the GECOS field. This should contain the user's full name and any relevant contact information. The Short Name field corresponds to the UNIX username. When filling in the password field, be sure to use a strong password. A strong password is not guessable and should contain a combination of letters, numbers, and special characters. Be sure the user changes her password when she first logs on to the host.
Figure 3.8 Adding a new user.
Leave the Password Hint field blank. As mentioned before this will be of great help to an attacker and should be disabled for the login screen. If need be, give the user administration privileges, but only do so if absolutely required. Also, you can allow the user to log in from a Windows host via SMB. This enables SMB access for the entire host and grants that user access to his or her files on the system. Again, only grant this access if it is required for your network. For more information on SMB and other network services, see Chapter 6, 'Internet Services.'
After the user has been added to the system you can further limit his access by clicking Capabilities in the Accounts pane. This allows for fine-grained control over what the user can and cannot do on the host. You can control whether the user can modify system settings, burn CDs, or even launch certain programs. Note that the Capabilities button is not available if the new user has administrator privileges. There is an option to enable the Simple Finder for the user. Simple Finder allows you to limit what applications a user can see. By selecting applications in the Applications list view, Simple Finder will only display the allowed applications. Also, Simple Finder can only open documents containing the users Documents folder in their Home. The Simple Finder cannot open ordinary folders.
The underlying mechanism that controls user accounts is not the standard UNIX /etc/password architecture. NetInfo is a distributed user management system that is employed by Mac OS X for authentication and authorization issues. When making changes to a user, you are really making the changes to the NetInfo database. For more information on NetInfo see NetInfo in Chapter 10, 'Directory Services.' The UNIX /etc/password construct is used by Mac OS X only in the event of booting to single user mode.
Limiting Access Is Hard to Do
Restricting access to a subset of programs is not always bulletproof. Remember Bruce's mischievous coworkers who were constantly breaking into each other's workstations? Well, they were also finding ways to break through various restrictions on their user accounts imposed on them based on Least Privilege. Through the sudo tool they were granted rights to the UNIX editor vi so they could edit various sensitive system files when needed. However, vi could be used to view files they were not supposed to view. It was also able to launch other programs from within itself. So using the higher privilege level of the vi process, they could run other programs which were not explicitly allowed to them under sudo.
The problem was due to transitivity of trust from sudo to vi to other external programs. By giving them explicit rights to use vi, sudo was actually giving them rights to all the programs on the host. Luckily, rather than be malicious about the excess trust, they used it as a tool to learn more about locking down user accounts. One of them would modify sudo to further limit access while still allowing everyone to do their jobs and the rest of them would try to break out of the little 'jail' that was created. It taught them the good and bad about Least Privilege and trying to enforce it.
Remember, just because a user does not have explicit access to a program through his account does not mean he will not find a way to access it.
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Allow Chrome.app Incoming Access Mac Os Utilities
The Application Blocking settings let you configure the firewall rules for the different applications that run on your Mac. Based on these settings, the firewall allows or blocks connections to the Internet from an application.
Allow Chome.app Incoming Access Mac Os 10.13
You cannot specify the firewall settings for applications based on the network to which your Mac is connected. The Application Blocking settings remain the same regardless of the network location. Application Blocking does not let you allow or block connections to a specific IP address.
Chrome Os Apps Download
When an application for which you have not specified Internet access tries to connect to the Internet, Norton product prompts you with a notification dialog. You can choose whether you want the firewall to allow or block the application from accessing the Internet.
In addition to setting Internet access for applications, you can select the following options for the application in the Application Blocking window:
Mac Os Must Have Apps
Search icon How to set due time on todoist mac app. | Lets you locate an application in the Settings list. |
Add application | Lets you add an application and configure the Internet access manually. |
Remove | Lets you remove a selected application from the Settings list. |
Allow applications that are signed by Apple | Lets you automatically allow the applications that are signed by Apple to access the Internet. |
Notify me when a blocked application tries to use the Internet | Lets you configure your Norton product to notify you whenever a blocked application attempts to access the Internet. |
Log all applications that use the Internet | Lets you keep record of the applications that access the Internet. This information is viewable in the Security History window. |
Reset to defaults | Lets you reset configuration to default level. |