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https://issues.apache.org/jira/browse/QPID-1899?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12776385#action_12776385
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Gordon Sim commented on QPID-1899:
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Sorry Steve, that was my fault! I forgot to consider the impact on windows.

The new parameter is the security strength factor (SSF) and indicates the level 
of security for communication (0 implies no security, 1 implies integrity 
checking only, >1 implies integrity and confidentiality with the number giving 
the encryption key length). The SSF is used to negotiate a SASL security layer 
on top of the connection should both parties require and support it.

This change was to ensure that connections with SASL level encryption are 
allowed when --require-encrypted is set, but that connections that do not 
negotiate such encryption and are over an unencrypted socket, are not.



> --require-encryption doesn't work unless cyrus sasl authentication is turned 
> on
> -------------------------------------------------------------------------------
>
>                 Key: QPID-1899
>                 URL: https://issues.apache.org/jira/browse/QPID-1899
>             Project: Qpid
>          Issue Type: Bug
>          Components: C++ Broker
>    Affects Versions: 0.5
>            Reporter: Gordon Sim
>            Assignee: Gordon Sim
>             Fix For: 0.6
>
>         Attachments: qpid-1899-10_26.patch, qpid-1899-10_30.patch, 
> qpid-1899-9-17.patch, qpid-1899-hacky.patch, qpid-1899.patch, qpid-1899.patch
>
>
> If you specify --require-encryption and --auth no then the broker will allow 
> un-encrypted conections. (If on the other hand you have authentication on, it 
> will prevent you connecting with anything other than a mech that supports 
> encryption and will require an encrypting sasl security layer - or of course 
> an ssl connection)

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