Configuring Hostnames and Domain Names Overview
The Host/Domain Name option enables you to configure a host and domain name for the security device. The host name is a character string that identifies the device. The host name, combined with a domain name, enables other devices to access the security device through a DNS server. If you define a fully qualified domain name (FQDN) for the device, you can use the FQDN as a gateway for a VPN tunnel.
For information about how to configure a hostname or domain name for a security device, see the hostname and domain commands in the NetScreen CLI Reference Guide.