Using OPENSSL to generate Self Signed certs - how you you set a NOT BEFORE date on the cert ?

Using OpenSSL to generate some self certs and I need to create a certificate with a specific date in the past.

What are the steps and switches needed if possible ?
I am using the following to create amy self cert, is there a switch to set a start date ?
openssl x509 -req -days 365 -in server.csr -signkey -node server.key -out server.crt
ccfcfcAsked:
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Dave HoweSoftware and Hardware EngineerCommented:
do you *need* to use openssl? the x509 subtool doesn't allow specifying a start date, although the ca subtool does (and can generate self-signed certs if needed)

however, I would recommend you use XCA - A java based GUI tool that lets you specify such things easily.
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ccfcfcAuthor Commented:
Perfect, thats a good tool in deed I must say .
Thanks very much
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