ZyXEL Communications Internet Security Gateway ZyWALL 2 Series - Manual (Page 64)

ZyWALL 2 Series User’s Guide
4-2 System
Table 4-1 System General Setup
LABEL DESCRIPTION
System Name Choose a descriptive name for identification purposes. It is recommended you enter
your computer’s “Computer name” in this field (see the Wizard Setup chapter for how
to find your computer’s name). This name can be up to 30 alphanumeric characters
long. Spaces are not allowed, but dashes “-” and underscores "_" are accepted.
Domain Name Enter the domain name (if you know it) here. If you leave this field blank, the ISP may
assign a domain name via DHCP.
The domain name entered by you is given priority over the ISP assigned domain
name.
Administrator
Inactivity Timer Type how many minutes a management session (either via the web configurator or
SMT) can be left idle before the session times out. The default is 5 minutes. After it
times out you have to log in with your password again. Very long idle timeouts may
have security risks. A value of "0" means a management session never times out, no
matter how long it has been left idle (not recommended).
System DNS Servers (if applicable)
DNS (Domain Name System) is for mapping a domain name to its corresponding IP address and vice
versa. The DNS server is extremely important because without it, you must know the IP address of a
machine before you can access it. The ZyWALL uses a system DNS server (in the order you specify here)
to resolve domain names for VPN, DDNS and the time server.
First DNS Server
Second DNS
Server
Third DNS
Server
Select From ISP if your ISP dynamically assigns DNS server information (and the
ZyWALL's WAN IP address). The field to the right displays the (read-only) DNS server
IP address that the ISP assigns.
Select User-Defined if you have the IP address of a DNS server. Enter the DNS
server's IP address in the field to the right. If you chose User-Defined, but leave the IP
address set to 0.0.0.0, User-Defined changes to None after you click Apply. If you set
a second choice to User-Defined, and enter the same IP address, the second User-
Defined changes to None after you click Apply.
Select None if you do not want to configure DNS servers. If you do not configure a
system DNS server, you must use IP addresses when configuring VPN, DDNS and the
time server.
Apply Click Apply to save your changes back to the ZyWALL.
Reset Click Reset to begin configuring this screen afresh.