Use the Wireshark capture software to capture the Telnet password

Use wireshark to grab a password for Telnet login

First open the GNS3 to create a simple topology diagram, the interface is labeled an IP address to prevent mixing

650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M00/58/E0/wKioL1S_ad6CCKPXAACFmL00PIc681.jpg "title=" Picture 1.png "alt=" Wkiol1s_ad6cckpxaacfml00pic681.jpg "/>

give two routers a IP address,Ping The connectivity  

650) this.width=650; "src=" http://s3.51cto.com/wyfs02/M00/58/E3/wKiom1S_ag2w1ErZAAK3pZi7g6A489.jpg "style=" float: none; "title=" Image 3.png "alt=" Wkiom1s_ag2w1erzaak3pzi7g6a489.jpg "/>

650) this.width=650; "src=" http://s3.51cto.com/wyfs02/M01/58/E0/wKioL1S_auPQPdX2AAKweImkgjQ133.jpg "style=" float: none; "title=" Image 2.png "alt=" Wkiol1s_aupqpdx2aakweimkgjq133.jpg "/>

Upon request in R1 to set the telnet login password and enter the privileged mode password, need to remember the password, this password is logged on the R2

650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M02/58/E0/wKioL1S_axaTBPctAALOS5E6uC8231.jpg "title=" Picture 4.png "alt=" Wkiol1s_axatbpctaalos5e6uc8231.jpg "/>

Open after Setup is complete Wireshark Grab the package software, open the way is to click on the topology map to grab the packet of the line, select the port to grab the packet

650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M00/58/E0/wKioL1S_az7Dk_r-AADVT4R7Emw112.jpg "title=" Picture 5.png "alt=" Wkiol1s_az7dk_r-aadvt4r7emw112.jpg "/>

so you can open it automatically . wireshark Select telnet to grab the packet

650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M01/58/E0/wKioL1S_a3mzA_tnAADtN3eNFUg206.jpg "title=" Picture 6.png "alt=" Wkiol1s_a3mza_tnaadtn3enfug206.jpg "/>

If you can't open it automatically Wireshark Please note the following configuration

650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M02/58/E3/wKiom1S_ayKCN_m9AAJoYMoNywM704.jpg "title=" Picture 7.png "alt=" Wkiom1s_aykcn_m9aajoymonywm704.jpg "/>

Open the CRT login R2 and then use Telnet to log on R2 R1

650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M02/58/E0/wKioL1S_bBjQKQmSAACBogoIqdA819.jpg "title=" Picture 8.png "alt=" Wkiol1s_bbjqkqmsaacbogoiqda819.jpg "/>

Open wireshark Check your password,R2 start here with telnet into R1

650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M02/58/E3/wKiom1S_a2jAhAgSAAjgucpFeUk164.jpg "title=" Picture 9.png "alt=" Wkiom1s_a2jahagsaajgucpfeuk164.jpg "/>

look down, look. Data packet , prompting for password to enter user mode

650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M00/58/E3/wKiom1S_bCHgK8_hAAE8S8YdfO4520.jpg "title=" Picture 10.png "alt=" Wkiom1s_bchgk8_haae8s8ydfo4520.jpg "/>

then look down to see only data packet, you can see all the passwords. This is the first password "character"

650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M01/58/E0/wKioL1S_bFfjAXQFAAWUUMN6aGM960.jpg "title=" Picture 11.png "alt=" Wkiol1s_bffjaxqfaawuumn6agm960.jpg "/>

Here is a hint of entering a password into privileged mode

650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M01/58/E0/wKioL1S_bRLSfR44AAXbeUw3bGk497.jpg "title=" Image 12.png "alt=" wkiol1s_brlsfr44aaxbeuw3bgk497.jpg "/> look down on the data packet to see the telnet password, this is the first password , keep looking down and you'll see all the passwords.

650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M02/58/E1/wKioL1S_bXjBrFmBAAWISyZtNqg871.jpg "title=" Picture 13.png "alt=" Wkiol1s_bxjbrfmbaawisyztnqg871.jpg "/>

This article is from the "My World" blog, please be sure to keep this source http://zhang2015.blog.51cto.com/9735109/1606715

Use the Wireshark capture software to capture the Telnet password