on port 27015 ? but port 27015 is not a HTTP port, it's the port to connect your HL server, no web browser can connect a HL server ! Your webmod plugin is running its HTTP server on another port, but I can assure you it won't be port 27015.
[edit]
I tried
http://62.166.3.191:80/ on port 80, which is default port for web servers, but it gives me an "access forbidden" page

But at least it tells that there is a http server beyond this port.