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https://issues.apache.org/jira/browse/SSHD-840?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Goldstein Lyor resolved SSHD-840.
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Resolution: Fixed
> Unknown commands cause IllegalStateException instead of being correctly
> handled
> -------------------------------------------------------------------------------
>
> Key: SSHD-840
> URL: https://issues.apache.org/jira/browse/SSHD-840
> Project: MINA SSHD
> Issue Type: Bug
> Affects Versions: 0.14.0, 1.6.0, 2.0.0
> Reporter: Robert Varga
> Priority: Major
> Fix For: 2.0.1
>
>
> As [https://github.com/CESNET/libnetconf2/issues/68] shows, MINA SSHD has a
> different behavior than OpenSSH when faced unknowns – in this case coming
> from a buggy server.
> While OpenSSH was able to establish a session, OpenDaylight (using SSHD
> 1.6.0) was not – throwing an IllegalStateException.
> Rather than throwing an exception, send an SSH_MSG_UNIMPLEMENTED as specified
> by [https://tools.ietf.org/html/rfc4253#section-11.4] .
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