Configuring a Cisco switch for SSH connection is an important task for network administrators. This process requires a good understanding of the Windows OS and network protocols such as TCP/IP, traceroute, etc. In this article, we will discuss the steps to configure a Cisco switch for SSH connection and how to troubleshoot any issues that may arise during the configuration process. We will also discuss the differences between configuring a switch and router and what makes them different in terms of security.
In our example, we have one layer-3 switch and 1 laptop with console connection. So we are going to configure our Cisco Switch on console to enable ssh connections.
Switch>enable Switch#configure terminal Switch(config)#username baris password 1234 Switch(config)#enable secret level 15 baris Switch(config)#int vlan 1 Switch(config-if)#ip address 192.168.1.10 255.255.255.0 Switch(config-if)#no shutdown Switch(config-if)# %LINK-5-CHANGED: Interface Vlan1, changed state to up Switch(config-if)#exit Switch(config)#line vty 0 4 Switch(config-line)#transport input ssh Switch(config-line)#login local Switch(config)#ip domain-name ITOPS Switch(config)#hostname SW1 SW1(config)#crypto key generate rsa The name for the keys will be: SW1.ITOPS 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]: 1024 % Generating 1024 bit RSA keys, keys will be non-exportable...[OK] SW1(config)#ip ssh version 2 *Mar 1 0:3:35.82: %SSH-5-ENABLED: SSH 2 has been enabled SW1(config)#do wr Building configuration... Compressed configuration from 7383 bytes to 3601 bytes[OK] [OK] SW1(config)#ip default-gateway 192.168.1.1 SW1(config)#do wr Building configuration... Compressed configuration from 7383 bytes to 3601 bytes[OK] [OK] SW1(config)# %LINK-5-CHANGED: Interface GigabitEthernet1/0/1, changed state to up %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/1, changed state to up %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan1, changed state to up SW1# %SYS-5-CONFIG_I: Configured from console by console SW1#
