Here are a few messages that come up in your Internet Site statistics, and a brief explanation of what they mean. These are some of the "hits" to a Web page that don't amount to a person viewing an actual page on your site.
Code 206 (Partial Content) means that only part of the file was transferred. This error is generated when a user clicks the stop button on their browser while downloading a page, or aborts a file download while it is still downloading.
Code 301 - Moved Permanently - The requested data was found at a different URL to the one given. 301 usually occurs if a user entered the address of a directory instead of a specific file
Code 304 - Not Modified - This does not really indicate an error, but rather indicates that the resource for the requested URL has not changed since last accessed or cached.
Code 404 - Not Found - Your Web server thinks that the HTTP data stream sent by the client (e.g. your Web browser) was correct, but simply can not provide the access to the resource specified by your URL. This is equivalent to the 'return to sender - address unknown' response for conventional postal mail services. This error is easily created if someone tries a URL with valid domain name but invalid page e.g. http://www.ibm.com/aaaaaaaaa.html.
Code 500 - Internal Server Error - Your Web server encountered an unexpected condition that prevented it from fulfilling the request by the client (e.g. your Web browser or our CheckUpDown robot) for access to the requested URL.
This is a 'catch-all' error generated by your Web server. Basically something has gone wrong, but the server can not be more specific about the error condition in its response to the client. In addition to the 500 error notified back to the client, the Web server should generate some kind of internal error log which gives more details of what went wrong. It is up to the operators of your Web server site to locate and analyze these logs.
Feel free to Google any of these and other messages that you might receive, for more information. All servers generate a bunch of these over time for all the above reasons. If Code 500 happened a lot, there would be something to worry about.
The 404 message count in your stats can get large because it is likely that spammers and hackers run applications that look for possible files to attack, so they might run a script that looks for numerous files that your site might have - ones that have a statistically higher probability of having security vulnerabilities. "submit_data.html" for example... or "log_in.html" that someone might have embedded the password into the page. Since they try a few of these on millions of websites, every site gets a certain amount of 404 messages. The other reason could be people simply typing in the address wrong, though on our server we have a spell checker that automatically corrects all of these.
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