Introduction to security risks

Question 1

What is a network security risk?

Answer 1

It is any potential threat or vulnerability that can be exploited to compromise the confidentiality, integrity, or availability of data and resources on a network

Question 2

What types of risks exist in networking?

Answer 2

1. Risk associated with hardware and network design,
2. Risk associated with people
3. Risk associated with protocols and software
4. Risk associated with internet access

Question 3

What is netfilter?

Answer 3

Netfilter is a framework built into the Linux kernel that provides various networking-related operations, primarily for packet filtering, network address translation (NAT), and packet mangling.

Question 4

How can netfilter be implemented and viewed in a Linux based enviroment?

Answer 4

On Linux you can manage it using tools like iptables or nftables, which let you create rules to allow or block data coming in or going out of your computer. To see what rules are currently active, you can use commands like sudo iptables -L or sudo nft list ruleset. You can also add rules to block or allow certain traffic, such as blocking an IP address or allowing SSH connections, this way your linux system is protected from unauthorized access