[APPIP:Error]Error: Invalid Request (file_get_contents) — Please check your Access Key ID and Secret Access Key for errors. Error: (CURL) RequestThrottled — AWS Access Key ID: 167N6X3R8WEHYYRJT382. You are submitting requests too quickly. Please retry your requests at a slower rate.
I've just read a really useful book on iptables: Linux iptables Pocket Reference.
It's a great reference book which is quite short but packed with more details than you'll ever want to know.