Firewalls are necessary for computers if we connect to internet. There are different kinds of methods how the firewalls work and check the incoming information. At the same time the firewalls let the outgoing ports open. It gives security for our computer and protects it from the system mistakes as well. For personal computers it can be enough and useful but for networks maybe not. Linux uses iptables filter to give stronger protection and security. It’s a software in basic Linux packages. We can exactly determine that how we would like to check the incoming traffic with this program. We can define the criteria for each port, services and we can define our own strict rules for our incoming traffic. For network level’s security there are several distributions for firewalls. IPCop is one of them. It’s only for security. We need a computer on which IPCop is running and there are some basic activities like framework, connection to network and routing. Linux distributions like SUSE or Fedora use to have graphical desktop, text editor and more software but on IPCop there are only these basic activities and the previously mentioned very important iptables. It’s our firewall between our network and the internet so we don’t work on it. It needs a more complicated setup but it’s worth because it gives strong protection for our network.
