If you have ten devices connected to the Wi-Fi, then all ten have the same outside IP address. All devices also have local IPs.
If you enable File Sharing on the Mac, you cannot connect and get access to the files by using external IP for instance, connect home Mac from work , but you can do it by using a local IP.
What does it mean to you? There is no need to enable the firewall on Macs at home because the router already protects you. After all, two firewalls are not better than one, so there is no need to run both. This applies mostly to desktop Macs such as iMac and Mac mini. However, if you use MacBook in public places such as hotels or Starbucks, then having the firewall turned on will only make your laptop more secure.
I ran a simple test which you can run on your MacBook too. Your numbers can be different, but note that with lower speeds the impact will be even less noticeable. It turned out that macOS comes with a firewall utility which is turned of by default. How do you set up a firewall on a Mac? Usually, there is no need to make any changes in Firewall options.
For instance, if you enable File Sharing in System Preferences, macOS will add file sharing setting in the firewall options. However, you need to watch for 3rd party apps. For instance, DropBox and uTorrent require changes in Mac firewall see pic and sometimes they need to be added manually.
As you can see, I blocked incoming connections for com. Enabling it will stop your Mac from responding to Ping commands, but I see no point in hiding it. If you are an advanced user and like to do everything in the Terminal here are some tips for you:. If you peeked into Firewall Options, you probably noticed that there only two options available when it comes to managing access of applications: allow or block incoming connections.
But how about outgoing connections? What if I want to block Adobe from accessing the internet? Unfortunately, the built-in firewall in macOS does not do it. In this case, you, if you really really want to, need to go with 3rd party solution. There are many apps out there. I know one popular solution — Little Snitch. I actually recommended to use it if you suspect that you have a keylogger installed on your Mac. By the way, if you want to learn more about various ways to protect your Mac check my other articles:.
Image credit: Flikr. Hi, I am Al. I've been working with computers for more than 20 years and I am passionate about Apple products. You can reach me at [email protected]. Five Eyes, Nine Eyes, and 14 Eyes are surveillance alliances in which countries have agreed to turn over data to each other for security or law enforcement reasons.
If an antivirus company is based in a country that belongs to one or more of these alliances, that means any country in the alliance can compel the company to turn over your data. We recommend looking for antivirus software that uses AES bit encryption, the standard the U. Some antivirus software options especially free ones sell user data or share it with third parties, which is both invasive and a potential threat to your security, since the more places your sensitive data is stored, the more likely it is to be stolen.
Macs have a built-in firewall, but it is turned off by default. However, these tools only protect against viruses and malware that Apple identifies, which make up a small percentage of the threats internet security companies identify each day.
For that reason, we recommend installing reliable third-party antivirus software on your Mac. Yes, you need virus protection on a Mac. From to , the incidence of the most dangerous types of malware on Macs increased by over 61 percent, according to Malwarebytes. Yes, Macs can get malware. In fact, according to Kaspersky, 1 in 10 Macs are infected with malware known as Shlayer. After all, one of its big marketing points for its computers is their security features.
Yes, Apple does have a virus scan. Its Malware Removal Tool automatically scans daily for viruses and removes any that it finds. Mac antivirus. State of Malware. New Mac malware reveals Google searches can be unsafe. Mac threat detections on the rise in Global market share held by operating systems for desktop PCs, from January to December It could potentially lead to more hassle with setting up certain network services. Browse All iPhone Articles Browse All Mac Articles Do I need one?
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