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Why does ILO3 replace underscore characters in OU field with spaces when a CSR is generated?

Occasional Contributor

Why does ILO3 replace underscore characters in OU field with spaces when a CSR is generated?

Hope someone can help with this.

On an ILO3 system (running firmware version 1.87), if we generate a CSR whose OU field contains an underscore character, the underscore character is *silently* transformed to a space character. As the content of the OU field has to be validated against a known list when the CSR is submitted for approval, the validation fails and hence no cert is issued which is a show-stopper for us.

If there is some good technical reason for the non-acceptance of underscore characters, then the GUI panel for filling out the CSR/cert fields should issue a warning at that stage., surely?

Here is one link:

https://support.rackspace.com/how-to/generate-a-csr-with-openssl/

showing that underscore is not a forbidden character in OU fields.

Alternatively, is there an "escape sequence" that should be used to prefix/surround the underscore so that it is accepted?

 

This does not happen on ILO4 systems, btw.

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Regards,

Richard.