ITC 242 Net Security Chapter 5

Nmap

A popular port scanners that has the ability to use a GUI front end

open port

A port state that allows access to applications and can be vulnerable

filtered port

A port state that may indicate a firewall is being used to allow specified traffic into or out of the network

closed port

A port state which does not allow entry or access to a service

port scanning

Allows you the ability to scan thousands or even tens of thousands of IP addresses quickly

Fping

Allows you to ping multiple IP addresses simultaneously and is usually included in Kali Linux

OpenVAS

An open-source fork of Nessus

RST

Closed ports respond to a NULL scan with this type packet?

unfiltered

In an ACK scan, if the attacked port returns an RST packet the attacked port is considered to be operating in this state

chmod +x script_name

In any *NIX system, after saving a script named "script_name," you need to make it executable so that you can run it.

Zenmap

Nmap has a GUI front end that makes it easier to work with some of the complex options by providing a GUI.

ping sweep

Performed by port scanners to scan large networks to identify which IP addresses belong to active hosts

Nessus

The original utility from which OpenVas was developed

Hping

Tool for performing ping sweeps and used to bypass filtering devices by injecting crafted or otherwise modified IP-packets

A

When using the text editor vim the command that appends text after the insertion point.

while

When writing a script the statement that allows you to avoid creating an endless loop in your script

XMAS scan

a port scan has the FIN, PSH, and URG flags set

do

a statement that is where the script performs its main task.

customized script

describes a flexible program that automates a task that takes too much time to perform manually

script

describes a text file containing multiple commands that would usually be entered manually at the command prompt

OpenVAS

pen-source network utility allows you to use plug-ins to run test programs (scripts) that can be selected from the client interface

ping sweep

procedure can be conducted to identify which IP addresses belong to active hosts

Dd

vi command deletes the current line