process information using digital techniques

You can use the SNMP protocol for various devices and applications including firewall and routers to communicate logging and management information with remote monitoring application.

UDP 161: Simple Network Management Protocol (SNMP):.

NBNS, also known as Windows Internet Name Service (WINS), maintain a database of the NetBIOS names for hosts and the corresponding IP address the host is using. DNS server always uses TCP protocol for the zone transfer. The TCP protocol helps to maintain a consistent DNS database between DNS servers.

Services and ports to enumerate:ĭNS zone transfer relies on TCP 53 port rather than UDP 53.

Extract Information Using DNS Zone Transfer:Īn Attacker can get valuable topological information about the target’s internal network using DNS zone transfer.

Attacker takes benefits from it and exploits the weakness to enumerate valid usernames.īy using SNMP APIs, attackers can guess the strings through which they can extract required username. This is the consequence of a design error in the application. Microsoft Active Directory is susceptible to a username enumeration weakness at the time of user-supplied input validation. Often users forget to change the default passwords that help an attacker to enumerate their data easily.

There are many online resources that publish many default passwords assigned by the manufacturer for their products.

Extracting Information Using the Default Passwords:.

The structure of the email address is For instance, is an email ID, then xyz (Character preceding the symbol) is the user name and (Character proceeding the symbol) is the domain name. Usually, email ID contains two parts the one is Username, and the other is Domain name.

Let’s discuss the possible ways an attacker might enumerate a target network and what countermeasure can be taken to prevent these. There are many ways to collect data, such as network users, routing tables and Simple Network Management Protocol (SNMP) information.

Process information using digital techniques