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OEM Agent Deploy to ODA has SSH MAC error

in Oracle Database Appliance (ODA) (MOSC) 3 commentsAnswered ✓

Whilst this issue is OEM related it is specific to ODA 19.22 targets so hoping there might be some insights.

I'm trying to deploy an OEM agent to a newly built ODA X9-2L running 19.22.

The agent deploy fails immediately due to ssh error.

"Connection to the SSH daemon (sshd) on the target host failed with the following error : MAC Error"

I've also had issues connecting to the appliance with WINSCP from my laptop with a similar MAC error :

"Incorrect MAC received on packet"

I was able to fix the winscp issue by putting AES-GCM as the first cipher in the SSH selection policy.

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