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Oracle VM: "Bad SSH2 mac spec" Error on Oracle VM Server (Doc ID 2378378.1)

Last updated on AUGUST 04, 2018

Applies to:

Oracle VM - Version 3.0.1 to 3.3.4 [Release OVM30 to OVM33]
Information in this document applies to any platform.

Symptoms

 On Oracle VM 3.3.4 or earlier version, you want to enable any of 'hmac-sha2-256,hmac-sha2-512,hmac-sha1', you got below error when trying to restart sshd service,

# service sshd restart
Stopping sshd: [ OK ]
Starting sshd: /etc/ssh/sshd_config line 141: Bad SSH2 mac spec 'hmac-sha2-256,hmac-sha2-512,hmac-sha1'.
[FAILED]

 

Changes

 To enable new ciphers and MACs by adding below two lines into the /etc/ssh/sshd_config:

And then restarting sshd service.

Cause

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