EHC - 2.3 Advanced PING ~ Backtrack Team

EHC - 2.3 Advanced PING

by Malik korrich ~ samedi 13 août 2016 Libellés : tutorial , Video

2.3 PING – Foot-printing - Ethical Hacking Course ( EHC )

About :

In this practical, we are going to learn about ping utility .

Requirements :

Clean windows installation ( I will be using windows 8.1 )

Practical :

1. Open cmd ( check out last practicals to learn how ).

How ping works :

Whenever you ping an IP address , a request is sent to it. The IP responses with a result . This result is sent back to the host who pings.

2. Enter the command ping www.google.com

Over Here , we are trying to ping google.com . We will get some kind of result in return .

Output :

Reply from xx.xx.xx.xx : bytes= 32 Time=64ms TTL=46

Over here the IP address of google is shown as xx.xx.xx.xx

Bytes = 32 is the number of bytes sent in one ping which can me changed according to the requirement . More number of bytes means more traffic to the website.

Round Trip Time :

Round trip time is basically the time taken to ping a website and to get the response from the website . One complete cycle of ping and reply is known as round trip time ( RTT ) . RTT is basically in milliseconds .

3. enter the command ping -f -l 1500 www.google.com

Output :

Packet needs to be fragmented but DF set.

Over here we are trying to ping and send 1500 bytes of data at a time. We get a reply that the packets should be fragmented , which basically means packets are too large to be sent and should be fragmented . There is a certain limit of data that can be sent at a time .

Maximum Frame Size :

Maximum frame size is the amount of data that can be sent at a time to a host. If the maximum frame size is crossed , the request will be discarded . It is important to find maximum frame size . It helps us to find the amount of data to send during DOS attacks . Check video tutorial given below to learn how to find maximum frame size.

Time To Live :

TTL or time to live is the time when the host is live . If the TTL is set to 0 , all the packets are discarded . This prevents loss of packets and thus allows us to understand if the host is live or not and is live for how much time.