Task: Configure SSH on Router R2

Router 1

R1(config)#interface fastEthernet 0/0

R1(config-if)#ip address 192.168.1.1 255.255.255.0

R1(config-if)#no shutdown 

Router 3

R3(config)#int fastEthernet 0/0

R3(config-if)#ip address 192.168.2.3 255.255.255.0

R3(config-if)#no shutdown

Router 2

R2(config)#int fastEthernet 0/0

R2(config-if)#ip address 192.168.1.2 255.255.255.0

R2(config-if)#no shutdown 

R2(config-if)#exit

R2(config)#int fastEthernet 0/1

R2(config-if)#ip address 192.168.2.2 255.255.255.0

R2(config-if)#no shutdown 

Step 1: Set router parameters

R2(config)#ip domain-name ccna5.com

Step 2: Generate Asymmetric Keys

R2(config)#crypto key generate rsa 

The name for the keys will be: R2.ccna5.com

Choose the size of the key modulus in the range of 360 to 2048 for your

  General Purpose Keys. Choosing a key modulus greater than 512 may take

  a few minutes.

How many bits in the modulus [512]: 

% Generating 512 bit RSA keys, keys will be non-exportable...[OK]

Step 3: Configure SSH timeouts and username

R2(config)#ip ssh time-out 15

R2(config)#ip ssh authentication-retries 2

R2(config)#username student password cisco

Step 4: Configure local authentication and vty

R2(config)#line vty 0 4

R2(config-line)#transport input ssh 

R2(config-line)#login local 

Verify SSH running

R1#ssh -l student 192.168.1.2

Open

Password: 

R2>

R3#ssh -l student 192.168.2.2

Open

Password: 

R2>

Download packet tracer file

Addressing Table

Configure RIP

R1

Router(config)#interface serial 0/0

Router(config-if)#ip address 192.168.1.1 255.255.255.0

Router(config-if)#clock rate 64000

Router(config-if)#no shutdown

Router(config-if)#exit

 

Router(config)#ip route 172.16.1.0 255.255.255.0 192.168.1.2

Router(config)#ip route 10.6.1.0 255.255.255.0 192.168.1.2

R2

Router(config)#interface serial 0/0

Router(config-if)#ip address 192.168.1.2 255.255.255.0

Router(config-if)#no shutdown

Router(config-if)#exit

 

Router(config)#interface serial 0/1

Router(config-if)#ip address 172.16.1.1 255.255.255.0

Router(config-if)#clock rate 56000

Router(config-if)#no shutdown

Router(config-if)#exit

 

Router(config)#ip route 10.6.1.0 255.255.255.0 172.16.1.2

R3

Router(config)#interface serial 0/0

Router(config-if)#ip address 172.16.1.2 255.255.255.0

Router(config-if)#no shutdown

Router(config-if)#exit

 

Router(config)#interface fastEthernet 0/0

Router(config-if)#ip address 10.6.1.1 255.255.255.0

Router(config-if)#exit

 

Router(config)#ip route 192.168.1.0 255.255.255.0 172.16.1.1

Verify RIP Routing

R1

Router#show ip route
Codes: C – connected, S – static, I – IGRP, R – RIP, M – mobile, B – BGP
       D – EIGRP, EX – EIGRP external, O – OSPF, IA – OSPF inter area
       N1 – OSPF NSSA external type 1, N2 – OSPF NSSA external type 2
       E1 – OSPF external type 1, E2 – OSPF external type 2, E – EGP
       i – IS-IS, L1 – IS-IS level-1, L2 – IS-IS level-2, ia – IS-IS inter area
       * – candidate default, U – per-user static route, o – ODR
       P – periodic downloaded static route

Gateway of last resort is not set

     10.0.0.0/24 is subnetted, 1 subnets
S       10.6.1.0 [1/0] via 192.168.1.2
     172.16.0.0/24 is subnetted, 1 subnets
S       172.16.1.0 [1/0] via 192.168.1.2
C    192.168.1.0/24 is directly connected, Serial0/0
Router#

R2

Router#show ip route
Codes: C – connected, S – static, I – IGRP, R – RIP, M – mobile, B – BGP
       D – EIGRP, EX – EIGRP external, O – OSPF, IA – OSPF inter area
       N1 – OSPF NSSA external type 1, N2 – OSPF NSSA external type 2
       E1 – OSPF external type 1, E2 – OSPF external type 2, E – EGP
       i – IS-IS, L1 – IS-IS level-1, L2 – IS-IS level-2, ia – IS-IS inter area
       * – candidate default, U – per-user static route, o – ODR
       P – periodic downloaded static route

Gateway of last resort is not set

     10.0.0.0/24 is subnetted, 1 subnets
S       10.6.1.0 [1/0] via 172.16.1.2
     172.16.0.0/24 is subnetted, 1 subnets
C       172.16.1.0 is directly connected, Serial0/1
C    192.168.1.0/24 is directly connected, Serial0/0
Router#

R3

Router#show ip route
Codes: C – connected, S – static, I – IGRP, R – RIP, M – mobile, B – BGP
       D – EIGRP, EX – EIGRP external, O – OSPF, IA – OSPF inter area
       N1 – OSPF NSSA external type 1, N2 – OSPF NSSA external type 2
       E1 – OSPF external type 1, E2 – OSPF external type 2, E – EGP
       i – IS-IS, L1 – IS-IS level-1, L2 – IS-IS level-2, ia – IS-IS inter area
       * – candidate default, U – per-user static route, o – ODR
       P – periodic downloaded static route

Gateway of last resort is not set

     10.0.0.0/24 is subnetted, 1 subnets
C       10.6.1.0 is directly connected, FastEthernet0/0
     172.16.0.0/24 is subnetted, 1 subnets
C       172.16.1.0 is directly connected, Serial0/0
S    192.168.1.0/24 [1/0] via 172.16.1.1
Router#

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Tasks: Configure some basic router setting:

1. Router name.

2. Router passwords: console, vty, enable password, perform password encryption.

3. Serial interfaces, FastEthernet interfaces.

4. Interface description.

5. Login banner.

6. Make configuration changes.

7. Back up configuration files to TFTP servers.

Router A

Router>enable

Router#configure terminal

• Router name

Router(config)#hostname RA

• Router passwords

RA(config)#line console 0

RA(config-line)#password cisco

RA(config-line)#login

RA(config-line)#exit

RA(config)#line vty 0 4

RA(config-line)#password cisco

RA(config-line)#login

RA(config-line)#exit

RA(config)#enable password cisco

RA(config)#enable secret cisco

• Serial interfaces, FastEthernet interfaces, interface description

RA(config)#interface serial 0/0

RA(config-if)#ip address 172.16.1.1 255.255.255.0

RA(config-if)#no shutdown

RA(config-if)#description This is Serial 0/0 on router A

RA(config-if)#clock rate 64000

RA(config-line)#exit

RA(config)#interface fastEthernet 0/0

RA(config-if)#ip address 192.168.1.1 255.255.255.0

RA(config-if)#no shutdown

RA(config-if)#description This is FastEthernet 0/0 on router A

• Login banner

RA(config)#banner motd # Router Basic Configuration – www.CCNA5.com #

• Make configuration changes

RA#copy running-config startup-config

Destination filename [startup-config]?

Building configuration…

[OK]

• Back up configuration files to TFTP servers

RA#copy running-config tftp:

Address or name of remote host []? 192.168.1.3

Destination filename [RA-confg]? RouterA

Writing running-config….!!

[OK - 803 bytes]

803 bytes copied in 3.14 secs (0 bytes/sec)

Router B

Router>enable

Router#configure terminal

• Router name

Router(config)#hostname RB

• Router passwords

RB(config)#line console 0

RB(config-line)#password cisco

RB(config-line)#login

RB(config-line)#exit

RB(config)#line vty 0 4

RB(config-line)#password cisco

RB(config-line)#login

RB(config-line)#exit

RB(config)#enable password cisco

RB(config)#enable secret cisco

• Serial interfaces, FastEthernet interfaces, interface description

RB(config)#interface serial 0/0

RB(config-if)#ip address 172.16.1.2 255.255.255.0

RB(config-if)#no shutdown

RB(config-if)#description This is Serial 0/0 on router B

RB(config-line)#exit

RB(config)#interface fastEthernet 0/0

RB(config-if)#ip address 192.168.1.2 255.255.255.0

RB(config-if)#no shutdown

RB(config-if)#description This is FastEthernet 0/0 on router B

• Login banner

RB(config)#banner motd # Router Basic Configuration – www.CCNA5.com #

• Make configuration changes

RB#copy running-config startup-config

Destination filename [startup-config]?

Building configuration…

[OK]

• Back up configuration files to TFTP servers

RB#copy running-config tftp:

Address or name of remote host []? 192.168.1.3

Destination filename [RA-confg]? RouterB

Writing running-config….!!

[OK - 785 bytes]

785 bytes copied in 0.125 secs (0 bytes/sec)

Naming a Device

Router>

Router>enable

Router#configure terminal

Router(config)#hostname CCNA5

CCNA5(config)#

Remove the name of a device:

CCNA5(config)#no hostname

Router(config)#

Set Password

• Console Password – Limits device access using the console connection

Router(config)#line console 0

Router(config-line)#password cisco

Router(config-line)#login

• Virtual Terminal Password (VTY Password) – Limits device access using Telnet

Router(config)#line vty 0 4

Router(config-line)#password cisco

Router(config-line)#login

• Enable Password – Limits access to the privileged EXEC mod

Router(config)#enable password cisco

• Enable Secret Password (Strongly encrypted enable password)

Router(config)#enable secret password

Set Banner

Router(config)#banner motd # Welcome to CCNA5.com #

Manage Configuration File

• Checking Configuration Files – Lists the complete configuration currently active in RAM

Router#show running-configuration

• If the active configuration in RAM is correct, it can be copied to NVRAM

Router#copy running-config startup-config

Removing All Configurations

Router#erase startup-config

Configure Router Interfaces

• Configuring Router Interfaces

Router(config)#interface type port

Router(config-if)#ip address IP_address subnet_mask

Router(config-if)#no shutdown

For example:

Router(config)#interface fastEthernet 0/0

Router(config-if)#ip address 192.168.10.1 255.255.255.0

Router(config-if)#no shutdown

• Configure Interface Description

Router(config)#interface fastEthernet 0/0

Router(config-if)#description Sales Lan

Ctrl+P (or up arrow): Displays the last command entered

Ctrl+N (or down arrow): Displays previous commands entered

Ctrl+A: Moves the cursor to the beginning of the current line

Ctrl+E: Moves the cursor to the end of the current line

Ctrl+F: Moves forward one character

Ctrl+B: Moves backwards one character

Esc+F: Moves forward one word

Esc+B: Moves backwards one word

Ctrl+R: Redisplays a line (starts a new line, with the same command shown)

Ctrl+U: Erases a line

Ctrl+W: Erases a word

Ctrl+Z: Exits configuration mode and returning you to privileged EXEC mode

Ctrl+Shift+6: Allow the user to interrupt an IOS process such as ping or traceroute

Ctrl+C: Aborts the current command and exits the configuration mod

The best program to use is Putty and best of all it is free. You can download putty here.

You simply install putty, plug your console cable in and connect over serial COM 1 port. If you are using the USB to COM adaptor you can look in device manager under COM and LTP ports and see which COM port you have been allocated.

PuTTY is a very useful tool, a small freeware implementation of Telnet and SSH for Win32 platforms, along with an xterm terminal emulator.
SSH, Telnet and Rlogin are three ways of doing the same thing: logging in to a multi-user computer from another computer, over a network.
Multi-user operating systems, such as Unix and VMS, usually present a command-line interface to the user, much like the `Command Prompt’ or `MS-DOS Prompt’ in Windows. The system prints a prompt, and you type commands which the system will obey.
Using this type of interface, there is no need for you to be sitting at the same machine you are typing commands to. The commands, and responses, can be sent over a network, so you can sit at one computer and give commands to another one, or even to more than one.
SSH, Telnet and Rlogin are _network protocols_ that allow you to do this. On the computer you sit at, you run a _client_, which makes a network connection to the other computer (the _server_). The network connection carries your keystrokes and commands from the client to the server, and carries the server’s responses back to you.
These protocols can also be used for other types of keyboard-based interactive session. In particular, there are a lot of bulletin boards, talker systems and MUDs (Multi-User Dungeons) which support access using Telnet. There are even a few that support SSH.

Download PuTTY here

Addressing Table

Configure RIP

R1

R1(config)#interface serial 0/0
R1(config-if)#ip address 192.168.1.1 255.255.255.0
R1(config-if)#clock rate 64000
R1(config-if)#no shutdown

R1(config)#router rip
R1(config-router)#network 192.168.1.0

R2

R2(config)#interface serial 0/0
R2(config-if)#ip address 192.168.1.2 255.255.255.0
R2(config-if)#no shutdown
R2(config-if)#exit

R2(config)#interface serial 0/1
R2(config-if)#ip address 192.168.2.1 255.255.255.0
R2(config-if)#clock rate 64000
R2(config-if)#no shutdown
R2(config-if)#exit

R2(config)#router rip
R2(config-router)#network 192.168.1.0
R2(config-router)#network 192.168.2.0

R3

R3(config)#interface serial 0/0
R3(config-if)#ip address 192.168.2.2 255.255.255.0
R3(config-if)#no shutdown
R3(config-if)#exit

R3(config)#router rip
R3(config-router)#network 192.168.2.0

Verify RIP Routing

R1#show ip route
Codes: C – connected, S – static, I – IGRP, R – RIP, M – mobile, B – BGP
       D – EIGRP, EX – EIGRP external, O – OSPF, IA – OSPF inter area
       N1 – OSPF NSSA external type 1, N2 – OSPF NSSA external type 2
       E1 – OSPF external type 1, E2 – OSPF external type 2, E – EGP
       i – IS-IS, L1 – IS-IS level-1, L2 – IS-IS level-2, ia – IS-IS inter area
       * – candidate default, U – per-user static route, o – ODR
       P – periodic downloaded static route

Gateway of last resort is not set

C    192.168.1.0/24 is directly connected, Serial0/0
R    192.168.2.0/24 [120/1] via 192.168.1.2, 00:00:26, Serial0/0

R2#show ip route
Codes: C – connected, S – static, I – IGRP, R – RIP, M – mobile, B – BGP
       D – EIGRP, EX – EIGRP external, O – OSPF, IA – OSPF inter area
       N1 – OSPF NSSA external type 1, N2 – OSPF NSSA external type 2
       E1 – OSPF external type 1, E2 – OSPF external type 2, E – EGP
       i – IS-IS, L1 – IS-IS level-1, L2 – IS-IS level-2, ia – IS-IS inter area
       * – candidate default, U – per-user static route, o – ODR
       P – periodic downloaded static route

Gateway of last resort is not set

C    192.168.1.0/24 is directly connected, Serial0/0
C    192.168.2.0/24 is directly connected, Serial0/1

R3#show ip route
Codes: C – connected, S – static, I – IGRP, R – RIP, M – mobile, B – BGP
       D – EIGRP, EX – EIGRP external, O – OSPF, IA – OSPF inter area
       N1 – OSPF NSSA external type 1, N2 – OSPF NSSA external type 2
       E1 – OSPF external type 1, E2 – OSPF external type 2, E – EGP
       i – IS-IS, L1 – IS-IS level-1, L2 – IS-IS level-2, ia – IS-IS inter area
       * – candidate default, U – per-user static route, o – ODR
       P – periodic downloaded static route

Gateway of last resort is not set

R    192.168.1.0/24 [120/1] via 192.168.2.1, 00:00:06, Serial0/0
C    192.168.2.0/24 is directly connected, Serial0/0

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