Editing Cisco IOS: Configure public RSA key authentication

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Main Command: <code>[[ip ssh]] pubkey-chain</code><ref>https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/sec_usr_ssh/configuration/15-s/sec-usr-ssh-15-s-book/sec-secure-shell-v2.html</ref>
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Main Command: <code>ip ssh pubkey-chain</code><ref>https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/sec_usr_ssh/configuration/15-s/sec-usr-ssh-15-s-book/sec-secure-shell-v2.html</ref>
  
 
Configuration Example in Linux:
 
Configuration Example in Linux:
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1. Generate your key if you do not have already one: <code>ssh-keygen</code>
 
1. Generate your key if you do not have already one: <code>ssh-keygen</code>
  
2. Split your key in 72 characters lines: <code>[[fold]] -b -w 72 ~/.ssh/id_rsa.pub</code> and copy output removing ssh-rsa and last part: username@hostname
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2. Split your key in 72 characters lines: <code>fold -b -w 72 ~/.ssh/id_rsa.pub</code> and copy output removing ssh-rsa and last part: username@hostname
  
 
3. Configure switch/router
 
3. Configure switch/router
 
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<pre>
Router_name_1#configure terminal
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Router_name_1#configure terminal
Router_name_1(config)#ip ssh pubkey-chain  
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Router_name_1(config)#ip ssh pubkey-chain  
Router_name_1(conf-ssh-pubkey)#[[username]] YOUR_USERNAME
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Router_name_1(conf-ssh-pubkey)#username YOUR_USERNAME
Router_name_1(conf-ssh-pubkey-user)#key-string
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Router_name_1(conf-ssh-pubkey-user)#key-string
Router_name_1(conf-ssh-pubkey-data)#AAAAB6NzaC1yc2EAAAABJQAAAQEAijoMF9oBwyQxwYbVlFprz+fG8oe5uAcCxwMw       
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Router_name_1(conf-ssh-pubkey-data)#AAAAB6NzaC1yc2EAAAABJQAAAQEAijoMF9oBwyQxwYbVlFprz+fG8oe5uAcCxwMw       
Router_name_1(conf-ssh-pubkey-data)#eIR1lyAnDJIsYbTbcdm+n5KiQnCt2561MpN4yOFpajFNM/dqH7/jYaqaicHCSV2F       
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Router_name_1(conf-ssh-pubkey-data)#eIR1lyAnDJIsYbTbcdm+n5KiQnCt2561MpN4yOFpajFNM/dqH7/jYaqaicHCSV2F       
Router_name_1(conf-ssh-pubkey-data)#RGauEp7FzN/uXxsX7mii6qOuxovl9OflLpXcvH5QH6551ycmL8nIv8UCY8uayiGI         
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Router_name_1(conf-ssh-pubkey-data)#RGauEp7FzN/uXxsX7mii6qOuxovl9OflLpXcvH5QH6551ycmL8nIv8UCY8uayiGI         
Router_name_1(conf-ssh-pubkey-data)#INsC0LyKEctWDW6qWp43T7rhcP0y4JoMraTCZLIPNE0Bo0bHgnGLg6fEvJmyB3sX       
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Router_name_1(conf-ssh-pubkey-data)#INsC0LyKEctWDW6qWp43T7rhcP0y4JoMraTCZLIPNE0Bo0bHgnGLg6fEvJmyB3sX       
Router_name_1(conf-ssh-pubkey-data)#H+7BaxHdYKg2OcIgVqYzclWhDwxj32kqd1BCq089iBMrb4QppDU2eM/t22iK29mn       
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Router_name_1(conf-ssh-pubkey-data)#H+7BaxHdYKg2OcIgVqYzclWhDwxj32kqd1BCq089iBMrb4QppDU2eM/t22iK29mn       
Router_name_1(conf-ssh-pubkey-data)#eqOGTiCkxB80ix+KULT9okmqkj3TbhCpunTfuPCCRNrjqndBsw==
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Router_name_1(conf-ssh-pubkey-data)#eqOGTiCkxB80ix+KULT9okmqkj3TbhCpunTfuPCCRNrjqndBsw==
Router_name_1(conf-ssh-pubkey-data)#exit
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Router_name_1(conf-ssh-pubkey-data)#exit
Router_name_1(conf-ssh-pubkey-user)#exit
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Router_name_1(conf-ssh-pubkey-user)#exit
Router_name_1(conf-ssh-pubkey)#exit
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Router_name_1(conf-ssh-pubkey)#exit
Router_name_1(config)#
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Router_name_1(config)#
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</pre>
  
 
View config:  
 
View config:  
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== Related Activities ==
 
== Related Activities ==
* [[Cisco IOS: Associate a user with default higher privileges]] using <code>username</code> command
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* [[Cisco IOS/Associate a user with default higher privileges]] using <code>username</code> command
* <code>[[transport input ssh]]</code>
 
* <code>[[ip ssh]]</code>
 
  
 
== See also ==
 
== See also ==
 
* [[Configure OpenSSH to allow Public-key authentication]]
 
* [[Configure OpenSSH to allow Public-key authentication]]
 
* <code>ssh-keygen</code>
 
* <code>ssh-keygen</code>
* {{IOS ssh}}
 
* {{IOS}}
 
  
 
[[Category: Cisco]]
 
[[Category: Cisco]]

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