Forum OpenACS Q&A: Response to Can't connect to Aolserver/ACS-host not found

Either grep or edit your server log (generally in /home/aolserver/log) and look for the word "Error."  Generally it's next to something like "Unable to bind to port 80," or some such.  While the nsd daemon is running, it's probably not doing anything useful.  If the port 80 is the problem, try starting nsd from root.