Free CCNA | Kali Linux Demo | Day 48 Lab | CCNA 200-301 Complete Course

Welcome and Introduction

In this section, Jeremy introduces the course and explains the format of the video.

Course Introduction

• The video is a free CCNA course.

• Viewers are encouraged to subscribe, like, comment, and share to support the series.

DHCP Exhaustion Attack Demonstration

This part focuses on demonstrating a DHCP exhaustion attack using EVE-NG and Kali Linux.

DHCP Exhaustion Attack Explanation

• Explanation of DHCP exhaustion attack where an attacker floods the network with DHCP Discover messages.

• Attacker depletes all IP addresses in the DHCP pool, preventing other hosts from obtaining IP addresses.

Configuring R1 for DHCP

• Reviewing DHCP settings on R1 including pool details and DNS server configuration.

• Checking available addresses in the DHCP pool and understanding leased addresses.

Yersinia GUI for Attack Launch

This segment covers launching a DHCP exhaustion attack using Yersinia GUI on Kali Linux.

Yersinia Attack Launch

• Opening Yersinia GUI on Kali Linux for launching attacks.

• Selecting 'sending DISCOVER packet' to initiate a Denial of Service attack.

Impact of Attack on Network Devices

Here, the impact of the DHCP exhaustion attack on network devices is explored.

Network Device Status Post-Attack

• Checking leased addresses post-attack showing all IP addresses taken with unique MAC addresses due to spoofing.

Network Attack Overview and Port Security Introduction

In this section, the speaker demonstrates testing Internet access on PC1 after obtaining an IP address. The discussion transitions to the DHCP exhaustion attack and introduces port security as a preventive measure against such attacks.

Testing Internet Access

• PC1 successfully acquires an IP address.

• Demonstrates accessing google.com via Firefox to test Internet connectivity.

• Confirms PC1's ability to access the Internet.

Introduction to Network Attacks

• Discusses the DHCP exhaustion attack as a type of network attack.

• Mentions the upcoming topic of Cisco switch feature, port security, for attack prevention.

Acknowledgment of Channel Members and Closing Remarks

The speaker expresses gratitude towards JCNP-level channel members and provides instructions for joining. Additionally, acknowledges support from various individuals and encourages engagement with the channel content.

Acknowledgment of Channel Members

• Thanks JCNP-level channel members individually by name.

• Apologizes for any mispronunciations in names but appreciates their support.

Closing Remarks

• Indicates recording date as May 13th, 2021, for reference.