SSI's

I've been using SSI's on my website for about six months, I use file
includes for headers, footers, and for the menu on each page.
My ISP fixed the config file so that .html files would be OK with this.
Now they have just informed me (after they made the changes!) that all my
files will have to be changed to .shtml files for 'security' reasons. I
guess I'll have to change every file - that's several hundred files, plus
all the internal links. This will mess up all my visitors too who use links
or favourite lists, or search engines to find me - am I correct in this?
I believe that security can be a problem for ISP's, but why would changing
the file extensions make anything more secure?

howardm

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