02 SSH Cisco Routers / Switches without password | Using Manual RSA key pair Authentication

𝗙𝗼𝗿 𝗖𝗼𝗺𝗽𝗹𝗲𝘁𝗲 𝗣𝘆𝘁𝗵𝗼𝗻 𝗙𝗼𝗿 𝗡𝗲𝘁𝘄𝗼𝗿𝗸 𝗘𝗻𝗴𝗶𝗻𝗲𝗲𝗿𝘀 𝗖𝗼𝘂𝗿𝘀𝗲:
𝗘𝗻𝗿𝗼𝗹𝗹 𝗳𝗼𝗿 𝗯𝗲𝗹𝗼𝘄 𝗨𝗱𝗲𝗺𝘆 𝗖𝗹𝗮𝘀𝘀: 𝟐𝟎𝟐𝟐 𝐕𝐞𝐫𝐬𝐢𝐨𝐧
𝑫𝒊𝒔𝒄𝒐𝒖𝒏𝒕𝒆𝒅 𝑹𝒆𝒇𝒆𝒓𝒓𝒂𝒍 𝑳𝒊𝒏𝒌:
Instead of password it uses,manually generated rsa key pair in the local machine for authentication

commands are
ls ~/.ssh/

conf t
ip ssh pubkey-chain
username nsrc
key-string
exit Failed to decode the Key Value
The maximum line length is 254 in cisco, but we can wrap smaller than this so that it fits on a terminal line.

username admin2 privilege 15

To generate sshkey pair, command in linux is
ssh-keygen -b 2048 -t rsa
#CiscoRSAkeySSH
#CiscoSSHwithoutPassword
#CIscoIOSRSAKey

[cyruslok]

thanks for sharing this demo, i got cannot decode key value error from the router when i tried to copy the entire pub key string into the router, did not know the entire key string needs to be folded into 70 characters per row. thanks for this demo!

[jungleplaya]

Thanks that was so informative. Do you have a demo in Windows?