Common SSI codes you might find useful:

<!--#echo var="HTTP_REFERER" -->	referring URL
<!--#echo var="REMOTE_ADDR" -->	visitor's IP address
<!--#echo var="REQUEST_URI" -->	requested URL
<!--#echo var="HTTP_HOST" -->	server name
<!--#echo var="HTTP_USER_AGENT" -->	visitor's browser
<!--#echo var="REDIRECT_STATUS" -->	redirect status code
<!--#echo var="DATE_LOCAL" -->	visitor's date and time
<!--#include virtual="path/file.ext" -->	file include

Note: rename your html pages to shtml if you use SSI

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