How to Block Remote Connections to a Windows or Mac Computer:
When you connect your PC to the Internet, applications send and receive information via a network connection. Usually, you should not have anything to worry about this data exchange as some apps and system functionality are required to function properly. On public or unsafe networks, however, you need to take extra precautions.
One way to stay safe on public networks (such as Wi-Fi in hotels, airports and restaurants) Block incoming connections On your device. This will prevent hackers and other malicious tools on the network from gaining access to your computer.
Conversely, blocking outgoing connections can prevent your apps from connecting to unsecured Internet networks. This is an effective way to prevent a suspicious app / malware from downloading additional malware or communicating with its server.
Block incoming connections on windows 10
You can restrict incoming connections Tweaking windows 10 firewall settings. Learn how to do it here.
1. Type control Panel Select more in the Windows search bar control Panel On the result.
2. Select Windows defender firewall.
pay attention: If you do not get the option of Windows Defender Firewall on your PC’s control panel, then set view by Options on the big icon or small icon in the top-right corner and check again.
On the Windows Defender Firewall menu, you should see your connection profile: Private or Public / guest network.
3. Select Change notification settings On the edge of the left.
4. In the “Public Network Settings” section, check the box that reads “Block all incoming connections, including a list of allowed applications.” Choose Okay To save changes.
If you do not fully trust the security of your private network (s), you can also prevent incoming connections to such networks in the “Private Network Settings” section.
Pro tip: To change the profile of a Wi-Fi or Ethernet connection, go to Adjustment > network and Internet > Wi-Fi or Ethernet. Select a network name and specify whether it is a private or public network Network profile Section.
Block outgoing connections on windows 10
There are two ways to prevent outgoing connections on Windows 10. Check them out below.
Method 1: Block outgoing connections for all apps
You can easily restrict outgoing connections to all apps by modifying Windows Firewall Advanced Security Settings. In the Windows Defender Firewall menu, select advanced settings On the edge of the left.
Right-click and select “Windows Defender Firewall with Advanced Security on Local Computer” a quality.
Go to public profile Tab if you are connected to a public network, or Personal profile Tab if you want to block outgoing connections to a private network. For Computers joined a domain, To Domain profile The tab is a place to block outgoing connections.
Click and choose the Outbound connection drop-down option Block Maitha. Choose Applicable and then Okay To save changes.
Method 2: Block Outgoing Connections for a Specific Program
Say you only want to block outgoing connections for your web browser, Windows lets you do this efficiently. Can also serve as a Parental control device To prevent your children from accessing the Internet.
In the Firewall Advanced Security menu, select and right-click Outbound rule. Choose New Rules On the context menu to proceed.
Choose program Choose more next.
Choose Browse To select the application.
Go for Local Disk (C 🙂 > Program files (x86) To find applications installed on your PC. Use the search box to locate an app that is not in the program file folder. Select and select the executable file (.exe) of the application Open.
Choose next To move forward. Later, select Block connection And click next.
Specify the network profile (s) for which you want Windows to block outgoing connections to the app. Choose next To move forward.
Give the outbound rule a name or description and choose Finish.
To unblock the outgoing connection for the app, double-click the outbound rule in the Firewall Advanced Security menu. Choose Allow connection, Then select Applicable And Okay.
Alternatively, you can right-click on the rule and select Remove or Disable rule. These options will also allow app access to initiate outgoing connections.
Block incoming connections on mac
Restricting incoming connections to the Mac is also straightforward. Read the steps given below.
1. Go to system Preferences > security and privacy.
2. in Firewall Select the lock icon on the tab, lower-left corner.
Enter your Mac’s password or use Touch ID to access the security preferences menu.
3. Select Firewall options To move forward.
4. To block system-wide (incoming) connections for all apps and services, check Block all incoming connections Box and select Okay.
When you block all incoming connections, your Mac will appear on other devices and networks. However, no device or person can establish a relationship with your Mac.
Note that it will also offer file-sharing services (such as AirDrop) and Remote access tool (Eg screen sharing) is temporarily unavailable.
5. To only block incoming connections to the underlying software, uncheck Automatically allow built-in software to receive incoming connections.
6. If you want to block incoming connections for a specific app or service, click Plus (+) icon.
7. Select the application (s) and select to link.
Pro tip: To choose multiple apps, hold Order And click on apps.
8. Click and select the arrow next to and below the app Block incoming connections.
Block outgoing connections on mac
macOS lacks a native tool or built-in method to block outgoing connections. There is a workaround that involves blocking the IP address or domain name of a website, but it is not straightforward. Similarly, this method can only be used to block outgoing connections for websites and not applications. Follow the steps below to try it out.
1. Launch a Finder window, go to Applications > Utilities Open more The terminal App.
2. Paste the command below in the terminal console and press The return.
sudo cp / private / etc / host ~ / documents / host-backup
This command will create a backup of your Mac Hosts file in the Documents folder (Finder > The document) Belongs to. The Hosts file is an important system file that macOS uses to match domain names with their respective IP addresses.
3. Enter your Mac password and press The return.
4. Paste this next command into the terminal and press The return.
sudo nano / private / etc / host
This gives you administrative permission to modify the host file. Enter your Mac password and press The return To move forward.
5. Type 127.0.0.1, Squeeze The tab Button on your keyboard, enter more Website URL You want to block. If you want to block YouTube, for example, type 127.0.0.1, Press The tab, And type www.youtube.com.
6. Press Control + O And press The return On your keyboard.
7. Later, press Control + x.
8. Finally, type or paste dscacheutil -flushcache And press The return.
Launch your browser and go to the website you blocked. Your browser should display an error message saying that it cannot connect to the website’s server.
Unblock outgoing connection on mac
You cannot unblock the outgoing connection of the app by entering some terminal code or command. You must restore the backup host file you created while blocking the app’s connection. Follow the steps given below to achieve this.
1. Go to Finder > The document, double click Host-backup Copy the file and its contents.
2. On your Mac desktop, select go Choose more on the menu bar Go to folder.
3. Paste the path at the bottom of the dialog box and select go.
/ Private / etc / host
4. Drag The host File on desktop.
5. Double-click the file on the desktop, delete its contents, and replace it with the contents Host-backup File (in step 1 above).
Close the TextEditor window and drag the host file back. / Private / etc. Folder.
6. Select To change At the prompt that appears on the screen. You may need to enter your Mac’s password or authenticate via Touch ID.
Go to the website on your browser and verify that it is no longer blocked.
Use third-party apps
Managing outgoing connections on MacOS is quite tedious. Interestingly, there are third party apps like Small bag And Radio silence This simplifies the task. These apps are not free, but they provide generous test modes that let you use them without paying for a specific period of time. Little Snatch (from $ 48.99) has a demo mode with a 3-hour limit per session while Radio Silence ($ 9) offers a 30-day free trial.
We tested both apps and they completely blocked outgoing connections. Radio Silence is a cost-effective option, but Little Snick is feature-packed and features advanced features such as silent mode, alert mode, network map, and more.