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L{tap.makeService} returns a L{StreamServerEndpointService} instance
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Make sure that if the C{--auth} command-line option is not passed,
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The C{--auth} command-line option will add a checker to the list of
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Multiple C{--auth} command-line options will add all checkers specified
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The checker created by the C{--auth} command-line option returns a
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The L{OpenSSHFactory} built by L{tap.makeService} has a portal with
L{ISSHPrivateKey} and L{IUsernamePassword} interfaces registered as
checkers.
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