# Predefined User Aliases

User Aliases are usually created by administrators, but there are also some predefined User Aliases in the SMC.

User Aliases are preceded with one $ character. The following table lists all editable automatically created User Aliases.

Table 1. System-defined User Aliases
Predefined User Alias | Description
--- | ---
$ DHCP address pools | Addresses that can be allocated by DHCP servers.
$ DHCP address pools for Mobile VPN clients | Address pools for assigning virtual IP addresses to mobile VPN clients.
$ DHCP servers | All DHCP servers defined for the Engine.
$ DHCP servers for Mobile VPN clients | The DHCP servers defined for assigning virtual IP addresses to mobile VPN clients.