Network Protocols for Security Professionals by Yoram Orzach
Author:Yoram Orzach [Orzach, Yoram]
Language: eng
Format: epub, pdf
Tags: attacking network protocol, network security protocol, networking, security, cybersecurity, network protocol, network attacks, cyber attacks, ipsec
Publisher: Packt Publishing
Published: 2022-08-05T00:00:00+00:00
Information gathering and packet analysis tools
The first step in hacking into a network is to gather information about it. In many cases, connecting your laptop to the network and starting some basic tools will provide you with enough information to move forward. Letâs start from the simple and obvious and continue with the tricky ones.
In this category, you have tools divided into four levels:
Basic network scanners: Tools for gathering information on devices connected to the network, their IP addresses, MAC addresses, DNS names, open TCP/UDP port basic information, and so on.
Network management tools: These are SNMP tools that were created to provide network management, though they can also be used for information gathering. Although communications devices should be configured with passwords (in SNMPv3) or community strings (in SNMPv1/2c), this doesnât always occur. In these cases, you will be surprised by the amount of information we can get from non-protected communication devices â IP addresses, routing tables, services that run on the device, and more.
Network analysis tools: When we connect a network analyzer to the network, even when connected without any extra configuration on the network, we will see broadcasts as well as multicasts being sent over the network. For example, ARP broadcasts will give us the IP addresses of the devices that send them, routing protocols broadcasts and multicasts will identify the routers that send them, NetBIOS broadcasts will identify network services, and more.
Protocol discovery tools: These are used to discover servers and services running in the network. These tools will discover open TCP/UDP ports and what is running on them, operating system (OS) types, and more.
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