Recently, we posted a blog on firewall misconfiguration horror stories. One of the great security myths is that inbound traffic is more dangerous than outbound traffic. This is based on the false notion that
unlike traffic from outside the network flowing in, traffic originating
from the inside the network is secure. But traffic from inside the
network can include, for example, bots that are transmitting sensitive
information. In this latest firewall management 201 video, Professor Avishai Wool shares some of his latest research, in which he identifies the mishandling of outbound traffic (E.g. allowing Outbound SMTP
from over 256 IP addresses) as the most common firewall configuration issue.
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