Network Security For Mac
As our lives increasingly go digital, security is a major concern not only for the various online services we use, but also for the devices on which we save our data. Chances are that if you’re reading this article, you own a Mac. And on your Mac, you’d like much of the work you do on it to be kept private. While OS X is relatively secure by default, there are some additional steps you can take to ensure the data on your Mac is only accessible by you, even if your Mac is stolen. Take the following tips to heart to better protect your Mac and its data. Enable the OS X firewall The firewall in OS X is a network filter that allows you to control which programs and services can accept incoming connections. While classic firewalls do this on a per-port basis—regardless of which software is using the port—OS X’s firewall can work on a per-application or per-service basis, giving you more flexibility.
To set up your firewall, go to the Security & Privacy system preferences, click on the Firewall tab, and then unlock the preference pane, after which you will be able to click the Turn On Firewall button. This basic option is the best for most purposes, but you can also click the Firewall Options button to see the specific settings for each application as well as access some additional features such as stealth mode (which hides your computer from outside access attempts) and an option for blocking all connections. OS X's advanced filewall settings give you more control over what comes in to your Mac.
The firewall is a good option to enable if you’re connected to a public Wi-Fi network, such as one at a cafe, library, or other hotspot. For home networks you can usually rely on your router’s firewall for protection, though enabling the OS X firewall for added security generally won’t cause additional problems. Enable FileVault FileVault is the full-disk encryption routine in OS X that will secure all files on the drive, including OS X system files, applications, caches and other temporary files; any of which may contain personal or sensitive information. To enable FileVault, go to the FileVault tab of the Security & Privacy system preference, unlock the preference, and click Turn On FileVault. When you do this you’ll be asked to choose the user accounts that are authorized to unlock the disk (you can add other accounts later, if you like). Click Continue and your Mac will begin encrypting your drive. This may take a while to do, especially with large mechanical drives, where both encrypting and optimizing may take a number of hours to complete.
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For a walkthrough on setting up FileVault,. Full disk encryption is primarily useful for protecting a stolen Mac. When your drive is unlocked, files on it can be read. However, before it’s unlocked (ie, your Mac is shut down), all data on the drive will be scrambled. This prevents data recovery by unauthorized third parties, who might try to access it using Target Disk mode on your Mac or by removing your Mac’s hard drive and attaching it to another computer.
Password management If you use numerous online services regularly then you will (or should) have different credentials for each one. These may be difficult to remember. Often people store their credentials in a text, Word, or Pages file for easy access, but this is a highly insecure way to store passwords. In OS X you have a built-in alternative for managing passwords called the keychain. Unlike other security options, the keychain is enabled by default to store your various passwords for online services, email accounts, sharing services, and many other authentication routines. Whenever you see a checkbox for saving your password, or in a drop-down menu when using Safari, this is OS X asking you to store these passwords in an encrypted file called the login keychain.
This keychain can be managed using the Keychain Access utility (/Applications/Utilities). In most cases, unless you’re troubleshooting your Mac, there’s little need to use this utility.
Instead, simply use the option to save your passwords and OS X will automatically enter them where appropriate. There are some third-party password tools such as that provide expanded password management.
If Keychain Access and Safari’s ability to store passwords don’t provide you with the features you need, try 1Password or a similar utility. Locking and locating A final couple of options for protecting your Mac include securing your computer when you have to leave it unattended and enabling remote access to it—not only to interact with it from afar, but also to track and lock it down, if needed. You set up the first of these options in the General tab of the Security & Privacy system preference. Just enable the Require Password option and choose Immediately or 5 seconds from the pop-up menu and you’ll be required to enter a password to use your Mac after it’s gone to sleep or the screen saver has started. The shorter the time interval you use in this feature, the better, especially for laptops. Just close the lid to lock the system.
There are few cases where it's not a good idea to lock your Mac when it sleeps. To remotely access and track your Mac, open the iCloud system preference and switch on the Back to My Mac and Find My Mac iCloud services. With the first option checked you can access the sharing services you’ve enabled on your Mac. For example, with Screen Sharing turned on, your remote Mac will appear in the Finder sidebar, where you can click it and share its screen to view and interact with your remote Mac’s desktop. For Find My Mac, if your system is ever stolen you can log into iCloud.com or use the Find My iPhone app on an iOS device to locate your device, send it a command to lock it down unless a password is supplied, have it issue a sound (also a great option for locating a misplaced iOS device), or remotely wipe the device. See for more details. Overall, while Apple can do very little to prevent your computer from being stolen, OS X does its best to protect the data it holds as well as offers a chance that you can pinpoint its location.
With these options enabled, you can be sure your Mac's data is as safe as possible, with little to no inconvenience for you.
Avast Security for Mac provides a range of scans to protect your Mac from malware and network threats. You can also create your own scan with parameters specified by you.
Refer to the sections in this article for details about available scan options. Access the Scans To open the Scan section in Avast Security for Mac:. Click the Avast Menu bar icon and select Open Avast from the context menu. Select Scan. Run Full System Scan To run a predefined, in-depth scan of your system that checks your storage drives and memory for malware:.
Click Start next to Full System Scan. When the scan completes, review the scan results. Run Removable Volume Scan To scan any removable storage devices that are currently connected to your PC, such as external hard drives, USB flash drives, CDs, and DVDs:. Click Start next to Removable Volume Scan. Select the volume you would like to scan and click Start.
When the scan completes, review the scan results. Run Custom Scan To run a custom scan with your:. Click Start next to Custom Scan. Select a file or a folder to scan. When the scan completes, review the scan results.
Run Home Network Security Scann Home Network Security Scan scans your router and all devices connected to your network for vulnerabilities and identifying potential security problems that open the door to threats. Click Start next to Home Network Security Scan. When the scan completes, review the scan results. The devices that are being scanned appear under the scan progress bar.
Schedule scan To create a scheduled scan:. Click Schedule next to Scheduled scan. Use the drop-down menu under Select scan type to select which scan you want to schedule. Use the drop-down menu under Launch to select how often the scan runs ( Weekly is selected by default). Select a launch date and time. Click Create scan. The scan appears under Scheduled Scan in the main Scan section.
Adjust scan settings. Although customizable settings are available for some predefined scans, we recommend you only modify settings for.
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Click Settings in the section of the scan you want to customize. Tick your preferred areas to scan. In the Excluded paths section, you can set an exclusion for a file or a folder that you do not want to scan:.
Click the plus icon. Select a path to a file or a folder to exclude it and click Choose to confirm. View previous scan reports. Open Avast Security and select Reports from the left panel. Click the arrow next to one of the following options to expand the section:.
Virus Scan Reports: displays results of Full System Scan, Removable Volumes Scan or Custom Scan. Home Network Security Scan Reports: displays results of Home Network Security Scan. To see details of a particular scan, click Open. You can select to send the detected files to the Virus Chest or delete the files (if they have not already been moved or deleted).
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For detailed instructions, refer to the following article:.