"Invalid Method in request" and 501.shtml "File does not exist" every 9 seconds

[jvanv8]

I'm getting these 2 errors every 9 seconds:

[error] [client xxx.xx.xxx.x] Invalid method in request \x80I\x01\x03\x01
[error] [client xxx.xx.xxx.x] File does not exist: /usr/local/apache/htdocs/501.shtml

Anyone have any ideas?
These are from a dedicated machine so I have full access with cPanel & WHM.

 

[cPanelMichael]

Hello

This post might be helpful:

Invalid Method In Request

Thank you.

 

[jvanv8]

So I guess it's because of SSL requests.
There are no SSL areas on the site.
I tried to redirect to http with htaccess but it never worked. When you try in a browser it just says "Webpage unavailable"

 

[cPanelMichael]

Per that post:

These "invalid request method" warnings are almost always caused by someone attempting to make a HTTPS connection to a site that has no SSL certificate installed.

The fact that you have no SSL certificates installed would confirm what that post is stating.

Thank you.

 

[jvanv8]

Thanks for the tip Michael.

This domain does not utilize HTTPS in any way.
I've banned several 'usual suspect' countries which reduces the errors but it still crops up with proxies etc.

Should I implement a self-signed certificate? The paid certificate seems overboard if it's not used.

 

[cPanelMichael]

You could install a self-signed certificate, yes. The primary downside to a self-signed certificate is that it will produce an "untrusted" browser warning when accessed.

Thank you.