FUNDAMENTALS OF COMPUTER

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COMPUTER THREATS SECURITY

WHAT IS A FIREWALL IN NETWORK SECURITY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
You have just been hired to conduct a security audit of a small business network. When you looked at their network closet, you noticed that they did not have a hardware firewall installed. You do see two servers in the closet, so you log into them to see if they have a software firewall enabled. Both machines are running a version of Linux on them. What application should you use to check if their software firewall is configured properly?
A
Windows Firewall
B
IPTables
C
IPFW
D
PF
Explanation: 

Detailed explanation-1: -A firewall may be concerned with the type of traffic or with source or destination addresses and ports. A firewall may also use complex rules based on analyzing the application data to determine if the traffic should be allowed through.

Detailed explanation-2: -A firewall is software or firmware that prevents unauthorized access to a network. It inspects incoming and outgoing traffic using a set of rules to identify and block threats.

Detailed explanation-3: -Most IT experts agree: to strengthen network security, all companies should implement a combination of both hardware and software firewalls.

Detailed explanation-4: -Limitations of a Firewall. Firewalls are not able to stop the users from accessing the data or information from malicious websites, making them vulnerable to internal threats or attacks. It does not prevent misuse of passwords and attackers with modems from dialing in to or out of the internal network.

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