You can limit access to the Administration Server and its files and directories by making them available only to clients using specific computers. You specify host names or IP addresses for the computers you want to allow or deny. Access to a file or directory using Host-IP authentication appears seamless to the user. Users can access the files and directories immediately, without entering a user name or password.
Because more than one person might use a particular computer, Host-IP authentication is more effective when combined with User-Group authentication. If both methods of authentication are used, a user name and password will be required for access.
Host-IP authentication does not require DNS (Domain Name Service) to be configured on your server. If you choose to use Host-IP authentication, you must have DNS running in your network, and your server must be configured to use it. To enable DNS, access the Server Manager for your server, click the Preferences tab, and then click Configure System Preferences. You will see the DNS settings.
Enabling DNS degrades the performance of Proxy Server because the server is forced to perform DNS lookups. To reduce the effects of DNS lookups on your server’s performance, resolve IP addresses only for access control and CGI instead of resolving the IP address for every request. To set this limitation, specify the following in obj.conf:
AddLog fn="flex-log" name="access" iponly=1