You can increase your network protection by using two firewalls.
TIP: Two firewalls on one Windows PC is near impossible. In most cases, one of the two programs will not even start. And even if they do, the programs block each other and thus make it impossible to work with the PC. However yoy can use two firewalls if they are installed on two different computers. One computer is your work PC with the usual Desktop Firewall, the other works as a router and protects the interface between your network and internet. Such as solution is usually used for Linux and requires good knowledge of TCP/IP, a good Open Source Firewall is available under www.m0n0.ch/wall (the 0 are zeros) . The expenditure is however worth it only if you want to protect important data

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