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Unable to login to filer using CBC based Ciphers for SSH after upgrade to 8.2.5P5

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data-ontap-8
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Applies to

  • Data ONTAP 7-Mode 8.2.5P5
  • SSH

Issue

  • Any attempt to login to filer via SSH using CBC based ciphers failed with below error:

-bash-4.2$ pbrun ssh -oKexAlgorithms=diffie-hellman-group14-sha1 -c 3des-cbc root@filer01
Unable to negotiate with 10.10.10.xx port 22: no matching cipher found. Their offer: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr

  • Login attempt to same filer using different cipher is successful
-bash-4.2$ pbrun ssh -oKexAlgorithms=diffie-hellman-group14-sha1 -c aes128-ctr root@filer-01
filer-01>

 

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