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Custom user with admin permissions cannot SSH into the switch if agent forwarding is enabled

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TitleCustom user with admin permissions cannot SSH into the switch if agent forwarding is enabled
Symptoms
Custom user with admin permissions cannot SSH into the switch if agent forwarding is enabled.
Environment
  • All Black Diamond switches.
  • Exos 16.2.2.4 patch1-3
Cause
When a default user(admin|user) tries to SSH into the switch, OpenSSH maps these 2 usernames to the internal Linux user accounts(admin|user) and it accepts the agent forwarding request (even though EXOS doesn’t support agent forwarding) hence allowing the user access to the switch but in case of the custom users, OpenSSH returns a fatal error causing the connection to be terminated hence the customer sees this behavior.
Resolution
This issue is addressed in the CR xos0069476 and will be fixed in EXOS 16.2.4-GA-Nov17.
Additional notes

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