I have tried to make this document accurate at the time of writing but I cannot guarantee that there are no mistakes. Security is a complex subject, where security is important to your product or installation you should seek professional advice.

I place no particular restrictions on the use of this document. You are free to reproduce, modify or translate this document. However, altered versions of the document should be annotated with the changes that have been made and the name of author of the change (so that my name is not associated with text that I did not write). —G.W.