If you follow the computer setup (in V5.21) you have the options to specify the IP address of the Citect Internet server. This will result in a setting

[DNS]
Primary = IP address

in the citect.ini file. The other necessary DNS settings will have to be filled in manually. If you specify both the Primary and the server name, then the server name will take preference.

Example:

I have a system, consisting of three servers. Server names that I use for the Citect ATR servers are PRI and STA.

So at startup the following Netbios names are registered: IOServer (PC1), PriTrend (PC2), PriAlarm (PC2), PriReport (PC2), StaTrend (PC3), StaAlarm (PC3), StaReport (PC3).

You can make PC1 the Citect Internet Server (only an IOServer can be an Internet Server), and then set the following DNS settings in the citect.ini at PC1.

When the IDC starts up you fill in the IP address of the Internet Server (192.168.21.200) and type in the password of either the display client (default is cit56disp) or the manager client (default is cit23man). Then the authenticated connection is made with the server, and the DNS settings from the Internet Server are copied to the citect.ini file of the IDC (in IDC/Bin directory).