ZyXEL Communications NBG410W3G - Manual (Page 253)

Chapter 14 DNS
NBG410W3G Series User’s Guide
253
Figure 153 ADVANCED > DNS > Cache
The following table describes the labels in this screen.
LABEL DESCRIPTION
DNS Cache Setup
Cache Positive DNS
Resolutions
Select the check box to record the positive DNS resolutions in the cache.
Caching positive DNS resolutions helps speed up the ZyXEL Device’s
processing of commonly queried domain names and reduces the amount of
traffic that the ZyXEL Device sends out to the WAN.
Maximum TTL Type the maximum time to live (TTL) (60 to 3600 seconds). This sets how long
the ZyXEL Device is to allow a positive resolution entry to remain in the DNS
cache before discarding it.
Cache Negative
DNS Resolutions
Caching negative DNS resolutions helps speed up the ZyXEL Device’s
processing of commonly queried domain names (for which DNS resolution has
failed) and reduces the amount of traffic that the ZyXEL Device sends out to the
WAN.
Negative Cache
Period
Type the time (60 to 3600 seconds) that the ZyXEL Device is to allow a negative
resolution entry to remain in the DNS cache before discarding it.
Apply Click Apply to save your changes back to the ZyXEL Device.
Reset Click Reset to begin configuring this screen afresh.
DNS Cache Entry
Flush Click this button to clear the cache manually. After you flush the cache, the
ZyXEL Device must query the DNS servers again for any domain names that
had been previously resolved.
Refresh Click this button to reload the cache.
# This is the index number of a record.
Cache Type This displays whether the response for the DNS request is positive or negative.
Domain Name This is the domain name of a host.