Which of the following firewall rules found on a firewall installed between an organization's internal network and the Internet would present the greatest danger to the internal network?

The correct answer is C. Permit all inbound tcp connections. Any opening of an internal network to the Internet is susceptible of creating a new vulnerability. Of the given rules, the one that permits all inbound tcp connections is the less likely to be used since it amounts to almost having no firewall at all, tcp being widely used on…

Submitted by diego_uy· Apr 18, 2026Network and Communications Security

Question

Options

APermit all traffic between local hosts.
BPermit all inbound ssh traffic.
CPermit all inbound tcp connections.
DPermit all syslog traffic to log-server.abc.org.

How the community answered

(28 responses)

A
7% (2)
C
89% (25)
D
4% (1)

Explanation

Any opening of an internal network to the Internet is susceptible of creating a new vulnerability. Of the given rules, the one that permits all inbound tcp connections is the less likely to be used since it amounts to almost having no firewall at all, tcp being widely used on the Internet.

Topics

#Firewall rules#Network security#Perimeter defense#Inbound traffic

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