ZyXEL Communications ZyWALL 110 User Manual page 336

Figure 232 Configuration > Network > Inbound LB > Add
The following table describes the labels in this screen.
Table 142 Configuration > Network > Inbound LB > Add/Edit
LABEL DESCRIPTION
Create New Object Use this to configure any new setting objects that you need to use in this screen.
General Settings
Enable Select this to enable this DNS load balancing rule.
DNS Setting
Query Domain Name Type up to 255 characters for a domain name for which you want the ZyWALL/USG
to manage DNS load balancing. You can use a wildcard (*) to let multiple domains
match the name. For example, use *.example.com to specify any domain name that
ends with "example.com" would match.
Time to Live Enter the number of seconds the ZyWALL/USG recommends DNS request hosts to
keep the DNS entry in their caches before removing it. Enter 0 to have the ZyWALL/
USG not recommend this so the DNS request hosts will follow their DNS server's TTL
setting.
Query From Setting
IP Address Enter the IP address of a computer or a DNS server which makes the DNS queries
upon which to apply this rule.
DNS servers process client queries using recursion or iteration:
•
•
Zone Select the zone of DNS query messages upon which to apply this rule.
Chapter 18 Inbound Load Balancing
In recursion, DNS servers make recursive queries on behalf of clients. So you
have to configure this field to the DNS server's IP address when recursion is
used.
In iteration, a client asks the DNS server and expects the best and immediate
answer without the DNS server contacting other DNS servers. If the primary DNS
server cannot provide the best answer, the client makes iteration queries to other
configured DNS servers to resolve the name. You have to configure this field to
the client's IP address when iteration is used.
ZyWALL/USG Series User's Guide
336