If I have to host several sites on one machine, which is better:

One instance of ZServer

Several instances of Zserver behind apache

Several instances of Zserver behind IIS

I prefer (d) one instance of ZServer with a VHM behind one instance of Apache. It's fairly common, and you can find lots of examples of it. The benefits are * Apache is well-hardened against the outside world and can do caching for extra speed (not to mention being free, simple, multi-platform, etc). Squid can also be good for caching. * having all your sites in the same Zope instance simplifies management greatly. It's all on one port, on one backup, etc. VirtualHostMonster is a great thing. --jcc