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AXIS Q1755/-E - System Options
NTP Configuration
Obtain NTP server address via DHCP - Check this radio button to automatically look up and use the NTP server settings as
provided by DHCP. Click the View button to see the current settings.
Use the following NTP server address - to create manual settings, check this radio button and enter the host name or IP
address of the NTP server.
Host Name Configuration - The network cameras can be accessed using a host name, instead of an IP address. The host
name is usually the same as the assigned DNS Name.
For more information, please see Security, on page 38.
Link-Local IPv4 Address
This is enabled by default and assigns the network cameras an additional IP address for use with UPnP™. The camera can have
both a Link-Local IP and a static/DHCP-supplied IP address at the same time - these will not affect each other.
HTTP and HTTPS
The default HTTP/HTTPS port numbers (80 and 443 respectively) can be changed to any port within the range 1024-65535.
This is useful for simple security port mapping, for example.
NAT traversal (port mapping) for IPv4
A broadband router allows devices on a private network (LAN) to share a single connection to the Internet. This is done by
forwarding network traffic from the private network to the “outside”, that is, the Internet. Security on the private network
(LAN) is increased since most broadband routers are pre-configured to stop attempts to access the private network (LAN) from
the public network/Internet.
Use NAT traversal when your network cameras are located on an intranet (LAN) and you wish to make it available from the
other (WAN) side of a NAT router. With NAT traversal properly configured, all HTTP traffic to an external HTTP port in the NAT
router is forwarded to the camera.
Notes:
• For NAT traversal to work, this must be supported by the broadband router. The router must also support UPnP
TM
.
• The broadband router has many different names: “NAT router”, “Network router“, Internet Gateway”, “Broadband
sharing device” or “Home firewall” but the essential purpose of the device is the same.
Enable/Disable - When enabled, the network cameras attempt to configure port mapping in a NAT router on your network,
using UPnP™. Note that UPnP™ must be enabled in the camera (see System Options > Network > UPnP).
Use manually selected NAT router - Select this option to manually select a NAT router and enter the IP address for the router
in the field provided.
If a router is not manually specified, the network cameras automatically search for NAT routers on your network. If more than
one router is found, the default router is selected.
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