NETWORK SCANNING

 NETWORK Scanning

·       Network scanning refers to a set of procedures used for identifying hosts, ports and services in a network.

·       Network scanning is one of the components of intelligence gathering which can be used by an attacker to create a profile of the target organization.

The purpose of scanning is to discover exploitable communications channel, probe as many listeners as possible, and track the ones that are responsive for an attacker’s particular needs.

Types of scanning

·       Port scanning – Lists the open ports and services.

·       Network scanning – Lists the active hosts and services.

·       Vulnerability scanning – shows the presence of known weaknesses.

SCANNING TOOLS

·       Nmap

·       Hping3

·       Metasploit

·       NetScanTools Pro

PING SWEEP – A network scanning technique you can use to find out which ip addresses map to live host.

PING SWEEP TOOLS

·       Angry IP Scanner

·       NetScanTools Pro

·       Colasoft Ping Tool

PORT SCANNING TECHNIQUES

·       TCP Scanning

·       UDP Scanning

·       SCTP Scanning

·       SSDP Scanning

·       IPv6 Scanning

BANNER GRABBING

Banner Grabbing is the method used to determine the OS running on the target system.

·       Active Banner Grabbing

·       Passive Banner Grabbing

PORT SCANNING COUNTERMEASURES

·       Configure firewall and IDS rules

·       Check wheather the firewall detects port scanning activity

·       Ensure that the router, IDS and firewall firmware are updated

·       Filter all ICMP messages at the firewall and routers

·       Ensure that the anti-scanning and anti-spoofing rules are properly configured


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