ZyXEL Communications ZyXEL ZyAIR 100 - Manual (Page 62)

ZyWALL 10~100 Series Internet Security Gateway
4-2 System
Table 4-1 System General Setup
LABEL DESCRIPTION
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).
Apply Click Apply to save your changes back to the ZyWALL.
Reset Click Reset to begin configuring this screen afresh.
4.3 Dynamic DNS
Dynamic DNS allows you to update your current dynamic IP address with one or many dynamic DNS
services so that anyone can contact you (in NetMeeting, CU-SeeMe, etc.). You can also access your FTP
server or Web site on your own computer using a DNS-like address (for instance myhost.dhs.org, where
myhost is a name of your choice) that will never change instead of using an IP address that changes each
time you reconnect. Your friends or relatives will always be able to call you even if they don't know your IP
address.
First of all, you need to have registered a dynamic DNS account with www.dyndns.org. This is for people
with a dynamic IP from their ISP or DHCP server that would still like to have a DNS name. The Dynamic
DNS service provider will give you a password or key.
4.3.1 DYNDNS Wildcard
Enabling the wildcard feature for your host causes *.yourhost.dyndns.org to be aliased to the same IP address
as yourhost.dyndns.org. This feature is useful if you want to be able to use, for example,
www.yourhost.dyndns.org and still reach your hostname.
If you have a private WAN IP address, then you cannot use Dynamic DNS.
4.4 Configuring Dynamic DNS
To change your ZyWALL’s DDNS, click SYSTEM, then the DDNS tab. The screen appears as shown.