Students who attend this course will be able to:

• Run diagnostic analysis test on networks using the Wireshark Network Analyser

• Find design faults in small switched and routed networks

• Identify Security zones within a small-medium sized network

• Diagnose security weaknesses in small networks using security tools such as NMAP and ZENMAP

• Design a small network for maximum security

Students who attend this course will be able to:

• Run diagnostic analysis test on networks using the Wireshark Network Analyser

• Find design faults in small switched and routed networks

• Identify Security zones within a small-medium sized network

• Diagnose security weaknesses in small networks using security tools such as NMAP and ZENMAP

• Design a small network for maximum security

Course Contents

Troubleshooting Methodology

• Challenge Task

• Problem solving model

• Problem solving worksheet

Identifying Layer 1, 2 & 3 problems

• L1/L2/L3 Exercise

• Layer 1 Tests

• Layer 2 Tests

• Layer 3 Tests

Using Wireshark as a troubleshooting tool

• Capturing

• Display Filters

• Capture Filters

• Problem diagnosis

What makes Ethernet... Ethernet?

• CSMA/CD

• Media Standards

Layer 2 vs Layer 3

• MAC addresses

• IP addresses

• Broadcast domains

• Hubs, switches & routers

Where do VLANs fit in?

• VLAN security

• Frame tagging

• Trunk/access ports

• Traffic between VLANs

• Layer 3 switching

VLAN troubleshooting

• VLAN islands

• Trunk negotiation

Understanding ARP

• ARP Request/Reply

• ARP cache

• ARP spoofing

Switching vs routing

• MAC Address Learning

• IP Forwarding

• Routing Logic

IP & IP Address Logic

• IP Datagram

• IP Addressing

• IP Subnets

• Troubleshooting IP

Above IP

• TCP

• HTTP

IP Utilities – DHCP & DNS – use and abuse

• Structure of the Name Space

• DNS Request and Reply

• DNS configuration

• DHCP operation

• DHCP control

• Ping & Traceroute

Network Security zones

• The Importance of Security

• Using VLANs to isolate trouble

• Viruses, Trojans and Worms

• Managing outbreaks

Identifying network design issues

• Secure Network design

• Security tools

• Placement of security devices

The role of Firewalls & Proxy servers

• Function of a Firewall

• Stateful Packet Inspection

• Firewall Security Zones

• The DMZ

• Network Address Translation

• Deep Packet Inspection

• Proxy Servers

• Web Filtering

• Email Monitoring

• Intrusion Detection/Prevention

Traffic between zones – troubleshooting ACLs

• Basic firewall configuration

• ACL configuration

• ACL troubleshooting

Using VMWare to troubleshoot OS (Linux & Windows) problems

• VMWare NIC operation

• Creating a Virtual Machine

• VMWare resources

Troubleshooting IP vulnerabilities

• DHCP Spoofing

• DNS Hijacking

Labs

• Tracing Traffic

• ARP

• Troubleshooting Worksheet

• Using VLANs to Create Security Zones

• IP Addressing

• Ping and Traceroute

• TCP/IP Name Resolution

• DHCP

• TCP Sequence Numbers

• HTTP Analysis

• Using VMWare

• Firewall Operation

• Troubleshooting ACLs