CMD Tools & Software Tools

This software tool:

• View wireless information• Signal-to-noise ratio,channel information, etc.

wireless packet analysis

This software tool:

Capture and display network traffic• Use a physical tap or redirect on the switch . used to detect network problems, intrusion attempts, and monitor network issues . aka packet sniffer . ex : wireshark

protocol analyzer

This software tool:

Bandwidth testing• Pre- and post-change analysis• Not all sites are the same

Speed test sites

This software tool:

Scan for open ports and IP addresses• Visually map the network• Rogue system detection

IP and port scanner

This software tool:

Performance monitoring• Speed testing• Run tests across different OSes

iperf

This software tool:

Gather traffic statistics• Standard collection method• Probes and collectors

NetFlow

This software tool:

Trivial File Transfer Protocol• File transfers, firmware upgrades• Your device is the TFTP server

TFTP Server

This software tool :

• SSH (Secure Shell)• Encrypted communication• Support across many OSes

Terminal emulator

test reachability to the tcp\IP address

ping

ping until stopped with ctrl-c

ping -t

resolve address to a hostname

ping -a

send # of echo requests

ping -n [count] [ip address]

send with don’t fragment flag set

ping -f

windows tcp\ip config

ipconfig

display all ip config details

ipconfig /all

release the dhcp lease

ipconfig /release

renew the dhcp lease

ipconfig /renew

flush the dns resolver cache

ipconfig \flushdns

linux interface configuration

ifconfig

the latest linux utility

ip address

what two commands can you use to look up info from DNS servers?

nslookup

dig

this cmd determines the route a packet takes to a destination

traceroute

view the local arp table

arp -a

show all active connections ( linux )

netstat -a

show binaries (linux)

netstat -b

do not resolve names ( linux )

netstat -

view the FQDN and ip address of the device

hostname

view the device’s routing table and find out which way the packets will go

route print ( windows )

netstat -r (linux or macOS)

login to devices remotely useful for checking a port or application

telnet [ip address] [ port number ]

capture packets from cmd line

tcpdump

this software

Network mapper - find network devices• Port scan - Find devices and identify open ports• Operating system scan– Discover the OS without logging in to a device

nmap

view interfaces on a device, view detailed interface information

show interface

view the device config

show config

view routing table

show route

electronic equipment used to test cables, such as unshielded twisted pair and coaxial cables.

Transmits a signal through the cable and then the signal is reflected back

TDR time-domain reflector

this device is used to test electrical circuits , measures voltage, current etc.

multimeter