Headers

view website header reponse codes etc.. Not sure if this should be in server tools or SEO tools. This tool always seems to be in amongst SEO tools.

http://en.wikipedia.org/wiki/List_of_HTTP_status_codes

en.wikipedia.org/wiki/List_of_HTTP_status_codes

This is a list of the server error codes a web server can send or a browser can display

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http://www.checkupdown.com/status/error1.html

www.checkupdown.com/status/error1.html

an excellent explanation of webserver error codes

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