Monitoring, Management & Location Tracking

What to do when you get Cipher error while copying support connection file from MAC


From 8.2.4 version onwards when we have to enable support connection we have to copy support_connection.tar file to Airwave server using scp and this can be done using a MAC or Unix platform.
When we do this using the MAC we might come across the below Cipher error.

no matching cipher found: client aes128-cbc,aes192-cbc,aes256-cbc server,aes128-ctr,aes192-ctr,aes256-ctr,,


The reason for this issue is Mac is looking for a different set of ssh ciphers, we need to have this added to the sshd_config on the Mac.


We can follow the below steps on MAC to do this,

  • Enable Remote login by navigating to System Preferences -> Sharing -> Check Remote Login box

  • Edit sshd_config file    

# sudo vi /etc/sshd_config

  • Add the below lines towards the end of the file

Ciphers aes128-cbc,aes192-cbc,aes256-cbc
MACs hmac-sha1,hmac-sha2-256,hmac-sha2-512
KexAlgorithms diffie-hellman-group14-sha1,ecdh-sha2-nistp256,ecdh-sha2-nistp384
ServerKeyBits 2048

  • Restart SSH on the Mac

# sudo launchctl unload /System/Library/LaunchDaemons/ssh.plist
# sudo launchctl load –w /System/Library/LaunchDaemons/ssh.plist

Now we should be able to copy the file from MAC to Airwave without the cipher error.



Version history
Revision #:
2 of 2
Last update:
‎07-20-2017 11:13 PM
Updated by:
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