thttpd+no-ip.com+vhost (multihoming) possible ???

Third and last, you must set up thttpd to handle the multiple hosts. The easiest way is with the -v flag, or the ALWAYS_VHOST config.h option. This works with either CNAME multihosting or multiple-IP multihosting. What it does is send each incoming request to a subdirectory based on the hostname it's intended for. All you have to do in order to set things up is to create those subdirectories in the directory where thttpd will run. With the example above, you'd do like so:

Now, what if you want to serve multiple domains? With HTTP/1.1 you can do "name based" virtual domains, which are very easy to set up. As of version 2.05 thttpd supports them.
 
    * DNS.
      Name-based virtual hosts are set up via the domain name system. You make a CNAME record (which is basically an alias) for each virtual host pointing at the real host. A full explanation of DNS and BIND is way beyond the scope of this document, but if you just tell your local DNS person that you want to make some CNAMEs, they'll know what to do.
 
    * Config file.
      All you have to do here is add the "vhost" option to your thttpd_config file.
 
    * Data directory.
      The data dir for a vhost system is different. The top level directory should not contain any HTML stuff. Instead all it contains is subdirectories, one per virtual host. The directory's name is just the virtual hostname, or an IP number The HTML for each host goes in its subdirectory. The vhost directory for my own secondary web server looks like this: