We often hear from users who say they don't use a firewall because it is too complicated to understand, or the command syntax is too opaque. The simpler it is to configure your firewall the less chance you have of inadvertently setting up conflicting or draconian rules.

Of course, you don't want your firewall rules to be so restrictive that your normal activities are curtailed. If your name's not on the list, you're not getting inside. They're like security personnel at an exclusive event. They filter network traffic by IP address, port, or protocol, and reject connections that do not meet a predefined set of criteria-the firewall rules-that you have configured.

Good security practice says you should limit and control the connections to your computer. Related: What Does a Firewall Actually Do? That's true for whether you're sharing across the room in your own home, remotely connecting to work from your home office, or using a distant, cloud-based resource. If it is accepted, packets of data-generically called network traffic-can pass in both directions over the connection. Software at the origin requests the connection, and software at the destination accepts or rejects it. Network connections have an origin and a destination.

For iphone instal Fort Firewall 3.9.