I site domain name(www.abc.com)was ranking well for many generic keywords. Buy one month back for most of my ranking had been gone because my home page is replaced by my index page(www.abc.com/index.html). how can i sort out this problem. Can I block my index page by robot.txt
make sure that all your links on your site back to your home page link to abc.com and not abc.com/index.html. This is common when a site is built using dreamweaver
Using robots.txt you can only exclude an entire folder (like www.abc.com/folder/) not a single page (like www.abc.com/index.html)
markbishop, Can you give the link to your site? I would like to snoop around and see if I can see anything glaring.