Difference between revisions of "Openssh client: Invalid key length"

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Tags: Mobile web edit, Mobile edit
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Error message from [[Openssh]] client when connecting to a Cisco router:
 
Error message from [[Openssh]] client when connecting to a Cisco router:
 
   [[ssh_dispatch_run_fatal]]: Connection to 10.10.10.4 port 22: [[Invalid key length]]
 
   [[ssh_dispatch_run_fatal]]: Connection to 10.10.10.4 port 22: [[Invalid key length]]
Solution:
+
Solution, execute in [[Cisco IOS]]:
 
  [[crypto key zeroize rsa‎‎]]
 
  [[crypto key zeroize rsa‎‎]]
 
  [[crypto key generate rsa modulus 2048]]
 
  [[crypto key generate rsa modulus 2048]]
Line 18: Line 18:
  
 
[[Category:ssh]]
 
[[Category:ssh]]
 +
[[Category:IOS]]

Revision as of 04:47, 31 July 2021

Error message from Openssh client when connecting to a Cisco router:

 ssh_dispatch_run_fatal: Connection to 10.10.10.4 port 22: Invalid key length

Solution, execute in Cisco IOS:

crypto key zeroize rsa‎‎
crypto key generate rsa modulus 2048


OpenSSH 7.6 (October 2017)

  • Refuse keys <1024 bits in length and improve reporting for keys that do not meet this requirement.


Related terms

See also

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