Telnet and SSH Configuration in Cisco Router

Enable Telnet Access

Ø  Router (config)#enable secret Cisco      (configuring password for enter in Enable and Configuration mode)      

Ø  Router (config)#line vty 0 4                  (5 User Simultaneously access the Switch} Vty: - Virtual Terminal

Ø  Router (config-line)#password Cisco                    {password}

Ø  Router (config-line))#login                            {Ask of user Credentials}

Ø  Router (config-line))#exit

 {To Verify}

ü  Enable “Telnet client” Feature in”)

ü  Add or remove Program

ü  Turn on or off window feature

ü  Check the Telnet Client)

Window Terminal

Ø  C:\Users> telnet 192.168.2.10      (Switch IP)

Cisco Recommended Use SSH Instead Telnet because telnet is not Secure it will Send data in Clear text

    
Enable SSH {Secure Shell}

ü  It Securely Send and Receive data over the network

ü  When we Login It Prompt us for Username and Password

 Configuration

Ø  Router (config)#username admin secret Cisco                   (creating username and password for ssh)

Ø  Router (config)#ip domain-name ccna.local                      (domain-name mandatory for SSH)

Creating Self-signed Digital Certificate

Ø  Router (config)#crypto key generate rsa

: 1024                             {ask for choose the size of key}

Ø  Router(config)#ip ssh version 2                                            (enabling SSHv2) 

Now implement these Credentials in vty line

Ø  Router (config)#line vty 0 4

Ø  Router (config-line))##login local                  (Local username and password we created earlier)

Ø  Router (config-line))##transport input ssh            {this will allow only ssh to Communicate across the Network}

Ø  Router(config-line))##exit

Now Verify using Putty install on your Pc

ü  Host Name: - Router ip address

Ø  Port: - SSH Default Port number 22 

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