A few weeks ago I ran into an issue with my web host that made me a little frustrated. Here's what was happening.

When creating a simple blog post with pictures and a bulleted list would send me to a blank page with a "page not found" error. I was a little confused with this, and wasn't really sure where to even start. The first place I checked was my watchdog log in Drupal. The only thing that it showed was the page not found error and it showed that I was trying to access a page called "500.shtml." When I ran into this a problem a while ago I decided to just modify my post and remove most of the html so that it would go through. This time there was no way around it.

I discussed this issue with another Drupal developer, that happens to be a good friend of mine, to see if this was something that he had seen before. His thought was that it was Apache that was stopping it because it was detecting it as a cross-site scripting (XSS) attempt. I immediately contacted LiquidWeb to see if we could figure out what was going on. After about 15 e-mails back and forth we were able to resolve the issue.

It definitely was Apache blocking so all the tech support guy did was told Apache to ignore the "/node" directory entirely. After that—everything worked! Now I can write anything in my posts and I don't get any errors. I'm not sure if any other web hosts run into this issue with Drupal, but if so then this is what you need to do to fix it!