Edit: After half day, my wife’s Mac started having the same problem. I have then applied the solution that I found in the Apple
Enabling Firewall in Snow Leopard
Internet is the best thing in the world, and we all know it. But with internet, many things have become unsafe. And since we generally don’t think much about security, we mostly ignore basic security apps of Apple.
Even if you haven’t witnessed any security problems with your Mac in, let’s say, twenty years, it is always best to install a basic firewall on your system. Setting up a firewall is very easy, but there are some things that you must keep in mind while installing it.
The use of firewall is simply to fight off bad traffic from accessing your system. It does so by using various protocols and networks. Since you’ve been working on the internet for quite some time now, you must know about various types of traffic that accesses your system through various ports. For example, web browsers use port 80 and emails use port 25. And other apps like webcam, chat and remote apps use different ports.
Whenever a program wants to communicate to any device, it does so with the help of a socket which is a file that tells about the protocol, along with the port and IP address. It can also specify remote port and IP address as well in some cases.
The firewall of your system decides the data that should enter your computer and the networks that can access your device. With firewall turned off, it’s as good as saying “feel free to scan my system and find open ports to hack into it.”
So what kind of a Mac user are you? Do you keep the firewall turned on, or do you pay no attention to the safety feature and keep it switched off?
Do you think Apple users should keep firewall activated, or should they use even stronger mechanisms? Or do you think Apple computers don’t require any safety? Let us know about your views through your comments.
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