Hi ,
You are using SSH for accessing the router.
SSH is an application and protocol that provides a secure replacement to the Berkley r-tools. SSH uses standard cryptographic mechanisms in order to secure the sessions. The SSH session between two devices is encrypted and, therefore, is secure. This encryption is an advantage over a Telnet session, in which the communication happens in clear text.
You need configure the following commands on 2801 router , where as same is configured on 3845 router.
In order to enable SSH-based access on the 2801 router ,, you first must configure the 2801 as a SSH server. Follow these steps in order to configure an SSH server on the from CLI:
Configure a host name and domain name for the router.
#configure terminal
#hostname XXX
#ip domain name XXXX
Generate a Rivest, Shamir, and Adelman (RSA) key for your 2801 router
Generation of an RSA key enables SSH on the 2801 router. Issue this command in global configuration mode:
#crypto key generate rsa rsa_key_size
!--- This generates an RSA key and enables the SSH server.
Note: The recommended minimum RSA key size is 1024.
1. Configure user authentication on the 2801 router.
On the 2801 router, you can configure user authentication to use either the local list or an external authentication, authorization, and accounting (AAA) server. This example uses a locally generated list in order to authenticate the users:
#aaa new-model
#aaa authentication login default local none
#username Test password Test123
#username ABC password xyz123
This configuration configures the 2801 router to perform user-based authentication with the use of a local database that is configured on the router. The example configures two users in the local database, "Test" and "ABC".
Configure the SSH parameters.
#ip ssh {[timeout seconds] | [authentication-retries integer]}
Thanks,
Satish
