That may not be the issue. There are known exploits for FrontPage extensions (older versions) that allow the hijacking of a server via a malformed form input.

What you may be seeing is the occasional errant script-kiddy checking your site for this vulnerability. I wouldn't worry about it, unless you are running an older version of the Frontpage extensions, that is.

We see this on every server a few times a week but don't pay any mind to it - we even see it on sites not using the FP extensions, so the bot's being used to look for the vulnerability aren't that smart, either.

Also, if you are running them, but never use them, it is much preferred to disable the extensions completely. Even most *nix servers have them installed.

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:not_the_usual1
[you decide]
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All in my opinion, which, when combined carefully with a $1 bill, gets you a cup of coffee at the corner store.