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Windows 2008/7: How to disable firewall correctly

Most of the time I found at customers’ sites that they disable firewalls completely, because they don’t have time or they are just lazy to define exceptions in firewall settings. But this is not really good idea according to security.

When you disable firewall by putting it into Off state:

Windows is not checking if traffic is allowed or not, but it is not even checking quality of IP packets. It doesn’t check if IP packet is malformed or not. IMHO, good way to allow all traffic in and out and also let windows check quality of IP packets is to turn firewall On and change Inbound and Outbound connections to state Allow:

This is not really secure, but it will protect your network from malformed traffic.


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