The following is for my own reference, borrowed from there and duplicated here because the original blog looks inactive and a fine candidate for deletion next time their domain or hosting will expire. No questions on this please, this is not my area of expertise at all.
One of the things you have to pay attention to when you move your website to another host is correct redirection to pages, and ensuring you're not giving 404 errors to legitimate requests. This morning I was checking my error logs and noticed a lot of pathetic attempts from script kiddies looking for an easy security hole to exploit :…
Page to check out and bookmark !
How to solve the "trailing slash" problem in misconfigured Apache
A few "refcards" (reference cards) I found and kept