IronPort Systems ZyAIR B-4000 - Manual (Page 46)

ZyAIR B-4000 Hot Spot Gateway
3-4 General System Setup
Table 3-1 SYSTEM
LABEL DESCRIPTION
Time Zone Choose the time zone of your location. This will set the time difference between
your time zone and Greenwich Mean Time (GMT).
Update Time Enter a number to determine how often the ZyAIR uses the NTP server to update
the time and date.
Daylight Saving Select this option if you use daylight savings time. Daylight saving is a period from
late spring to early fall when many countries set their clocks ahead of normal local
time by one hour to give more daytime light in the evening.
Start Date Select the month and day that your daylight-savings time starts on if you selected
Daylight Saving.
End Date Select the month and day that your daylight-savings time ends on if you selected
Daylight Saving.
NAT (Network Address
Translation) Enable NAT to have the ZyAIR translate Internet protocol addresses used within
one network (for example a private IP address used in a local network) to a
different IP address known within another network (for example a public IP
address used on the Internet). See the LAN Devices chapter for more on NAT.
IP Plug and Play (IPnP
Technology)
Activate IP Plug and Play (iPnP) to allow computers to connect to the ZyAIR or
access the Internet through the ZyAIR without changing their network
configuration. This allows computers with static IP addresses that are not in the
same subnet as the ZyAIR’s LAN IP address to connect to the ZyAIR or access
the Internet through the ZyAIR.
When you disable iPnP, only computers with dynamic IP addresses or static IP
addresses in the same subnet as the ZyAIR’s LAN IP address can connect to the
ZyAIR or access the Internet through the ZyAIR.
DNS Fake IP Reply Some subscribers’ Internet browsers may be set to use an HTTP proxy with a
private domain. Select this option to have the ZyAIR send a default IP address
(169.254.1.1) in response to DNS queries. This way the subscribers’ computers
can send HTTP requests that the ZyAIR can redirect so the subscribers can login.
Layer 2 Isolation
Security If you activate NAT, select Enable in this field to prevent communication between
subscribers. This is the default selection.
Select Disable, to deactivate layer 2 security and allow communication between
subscribers.