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Securing the Net

LUHack

resources

Cheat Sheet

Spec


Intro to Network Security


Life of a Packet


Devices being used

Firewall

Router

Switch


VLANs

VLAN ids and security


Subnets

Subnets are segments of larger networks

CIDR IP: 10.0.0.1/8

Subnet: 255.0.0.0

Includes all addresses from 10.0.0.0 to 10.255.255.255


or

CIDR IP: 192.168.1.1/25

Subnet: 255.255.255.128 Binary subnet: 11111111 11111111 11111111 10000000

Includes all addresses from 192.168.1.0 to 192.168.1.127


Remember

All issues with networks can be traced back to layer 8


Demo

I’m going to show you how to set up a switch and a firewall, these bits are going to be important.


luhack.uk/w18