Frequently Asked Questions

Frequently asked questions about ZWS.

Section 1: Sources of Information

• What sources of information are available
• How do I change the IP address my license key is bound to?
• What are the different license key options?

Section 2: Installation

• Why do I get libdb.so.2 cannot open shared object file messages with Redhat 8.0?
• Which platforms/software versions are supported
• How do I perform an unattended installation?

Section 3: Performance Tuning

• What NFS related issues should I be aware of?
• Why do hostnames continue to be logged after DNS lookups are disabled?
• What do I need to know about File Descriptors for best system stability?
• How can I accelerate Zeus' performance with Sun's Network Cache Accelerator?
• Why is one zeus.web process doing all the work on my multi-CPU machine?
• What factors should I consider before deploying Zeus Web Servers into a live environment
• How can I tune the web server for maximum performance?
• What are all the different configuration settings and tunables? - Part 1
• What are all the different configuration settings and tunables? - Part 2
• Why am I seeing high CPU usage when ZWS is running?

Section 4: Administration

• How do I make Zeus start automatically when my machine boots up?
• How do I change the 'admin' user name to something else?
• How do I delegate admin tasks to the webmaster?
• What do I do if I get problems resolving DNS names?
• I have turned off DNS lookups for one of my virtual servers, but the web server continues to log hostnames in the access log. Why is this?
• What errors may be logged and where?
• I've forgotten or lost my admin server password, what should I do?
• Why can't I access my server with its IP address or its hostname?
• What do I need to know about Log Rotation?
• Zeus cannot bind to port 80. How do I find out what is already bound to it?
• How can I prevent the Zeus Web Server from binding to all available interfaces?
• Where is my system log file?
• How do I update the license key of my web server?
• How do I upgrade my copy of Zeus?
• How does the product version numbering scheme used by Zeus work?
• Installation works fine, but virtual servers will not start. Why?
• What is $ZEUSHOME?
• I've upgraded my ZWS installation, but now my CGIs wont run?
• Why does ZWS appear to run as 'root' under HP-UX?

Section 5: Access Control

• How do I implement access control for many users, each with their own password?
• Can an application perform its own access control?
• How do I use the AuthUserDBMFile .htaccess directive?
• What are the recommended Unix filesystem permissions for customers' docroots?
• How do I manage large .htaccess password files in Zeus?
• How can I authenticate clients using referrer information?
• Can I authenticate users through a Database Authentication Module?

Section 6: Functionality

• Does Zeus have any date-related issues?
• How many virtual servers can I run with Zeus?
• What sort of architecture does Zeus use?
• Why is the throttle module allowing more connections through than it has been configured to accept?
• How can I enable or disable the Zeus SNMP support?
• Does Zeus support multi-lingual (Unicode) domain names?
• How do I chroot CGI scripts?

Section 7: SSL Certificates

• How do I create chained certificates
• How do I migrate my X509 certificates from Apache Stronghold to Zeus?
• Can I migrate my Netscape SSL certificates to Zeus?
• Can I have multiple SSL virtual servers on the same IP address and port number?
• How do I renew SSL certificates

Section 8: Diagnostics

• Why do I see '500 Internal Server Error' when running a CGI?
• What is truss or strace?

Section 9: Third-Party Product Integration

• How do I compile ISAPI filters and extensions?
• Why does my ISAPI module fail to load?
• I want to use ISAPI with my web server - how do I get started?
• Does Zeus Web Server support Load Balancers?
• How can I debug/trace NSAPI applications?
• How can I attach a debugger to an NSAPI application?
• How can I debug shared library problems with NSAPI?
• I have a question regarding integrating a Third Party Product with Zeus Web Server
• How do I prevent zeus.statd/zeus.isapi/zeus.nsapi from being started?
• In your integration documentation, you make reference to several PHP variables - can you tell me more about them?
• Can you chroot the Microsoft FrontPage extensions?