Connecting to a GIS server in ArcCatalog
ArcCatalog provides two options for connecting to a GIS server: you can create either an administrative connection to manage GIS services, or a user connection to use GIS services.
When you connect as an administrator, you can use and edit the properties of all the services running on the server. You can also add, remove, start, stop, and pause services. Consequently, you must be running ArcCatalog as a member of the server's agsadmin group in order to make an administrative connection.
Using ArcCatalog, you can only make an administrative connection through a local area network. If you want to administer the server through the Internet, use ArcGIS Server Manager.
If you are unable to connect to the server or you can connect but don't have administrative access, it means your operating system account does not have the right permissions for accessing your GIS server. The first time you connect to the GIS server after installation, you'll need to add one or more container machines to it.
When you connect as a user, you can view and use the services on the server, but you cannot edit their properties or add, remove, start, stop, or pause services. When making a user connection, you can choose to connect to a local server running on the local area network (LAN) or a remote server over the Internet. You must be running ArcCatalog as a member of the server's agsusers group to make a user connection over the LAN.
If you are connecting to a server through the Internet, choose Internet and type the URL of the server or folder you want to connect to. The URL will be formatted as follows: http://<server name>/<instance name>/services (Example: http://myServer/arcgis/services).
You also need to type a name and password if the server administrator has enabled security.
Note to administrators: A Secure Sockets Layer (SSL) connection is recommended if users will be transmitting user names and passwords to your server.