Codeigniter error logs show a 404 non-existing images directory...need to worry?

I've recently started logging my errors through codeIgniter. Since doing so, I have noticed a lot of 404 errors for directories that don't exist. For example:

ERROR - 2010-05-15 21:06:26 --> 404 Page Not Found --> someController/images

Where someController is, obviously, a controller. The problem is, there are no functions within that controller called images, nor are there any links 开发者_如何学JAVAto a directory by that name. Could this be that someone is trying to hack my site? If so, do I need to worry? If not, why is this happening? Thanks, and forgive the newby-ness.

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Could it be a problem with relative links? I'm yet to hear of an exploit looking for non-existent image directories, though that kind of relies on the type of site you operate.

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Looks like a bot

Not all bots/browsers are intelligent about following links.(like the ones in css). Some bots try the wrong URL to retrieve a resource.

De burst of error errors also indicate the usage pattern of a webcrawler.

I wouldn't worry about it from a security standpoint.

You might want to try out a dead-link test tools to help identify broken link.
But some bots just dont get it.

Errors like "404 /phpMyAdmin/script/setup.php" are attempts to hack your site, but these are failed attempts.

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you have a wrong link

for example

wrong "< link type="image/x-icon" href="images/logo.png/> "

the logs will appear a message ERROR - 2010-05-15 21:06:26 --> 404 Page Not Found --> someController/images

correct "< link type="image/x-icon" href="< ?php echo base_url() ? >images/logo.png/> "

sorry my english is not good