You must configure a domain name also before generating RSA keys.įollow these Cisco IOS CLI commands to configure a hostname, a domain name and to generate RSA keys of 1024 bit length. The default device name of a Cisco Router is "Router" and default device name of a Cisco Switch is "Switch". Before generating RSA encryption keys, you must change the default hostname of a Cisco Router or Switch. Step 2: Cisco devices use RSA public key encryption algorithm for SSH connectivity. OmniSecuR1(config)#username jajish privilege 15 secret OmniSecuPass
How to configure cisco switch password#
Follow these steps to create a local user with username "jajish" and password as "OmniSecuPass" and with a privilege level 15. Step 1: First step in configuring SSH to securely access the CLI interface of a Cisco Router or Switch remotely is to create a local user database for user authentication.
How to configure cisco switch how to#
How to configure SSH (Secure Shell) in Cisco Router or Switch for secure remote access SSH uses TCP as its transport layer protocol and uses well-kown port number 22.
Both SSH1 and SSH2 supports secure connection over network, but SSH2 supports for public key certificates and Diffie-Hellman key exchange. SSH has two main versions, SSH1 and SSH2. SSH supports Authentication to reliably determine the identity of the connecting computer, encryption to scramble data so that only the intended recipient only can read it and Integrity to guarantees the data sent over the network is not changed by a third party. SSH (Secure Shell) protocol provides the three main ideas of security authentication, confidentiality (via encryption) and integrity of data transfer over a network. SSH (Secure Shell) is a protocol which define how to connect securely over a network.
Network administrators must disable telnet and use only SSH wherever possible. Telnet is used only as network testing tool like ping or netstat these days. SSH supports authentication, confidentiality and integrity for remote administration. SSH replaced telnet and SSH is much more secure than telnet. Telnet is an insecure protocol for remote server configuration. Telnet was the protocol which Network Administrators were using for accessing the CLI console of a server or a network device remotely.
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