An article on Server Watch entitled "Making an Open Source Server Enterprise Ready" reviews the Covalent Enterprise Ready Server, which claims to offer increased reliability and security over the stock Apache server. One of the features that interests me is the Covalent Management Portal, a hardened Web-based server configuration tool that can manage from one to "hundreds" of Covalent ERS servers. This includes support for SNMP v1, SNMP v2c and secure SNMP v3. At $1500/CPU its not cheap.