Motorola HH1620, User Manual

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Configuration
and the existing DHCP server must be re-configured to treat the
HH1620 as the default Gateway.
The Start IP Address and End IP Address fields set the values used by
the DHCP server when allocating IP Addresses to DHCP clients. This
range also determines the number of DHCP clients supported.
Universal Plug and Play (UPnP) is a distributed, open networking standard that uses TCP/IP
for simple peer-to-peer network connectivity between devices. An UPnP device can
dynamically join a network, obtain an IP address, convey its capabilities and learn about other
devices on the network. In turn, a device can leave a network smoothly and automatically
when it is no longer in use. UPnP-enabled devices may communicate freely with each other
without additional configuration. Disable UPnP if this is not your intention.
NAT – Virtual Servers
You can configure the HH1620 as a virtual server so that when the remote users accessing
services such as the web of FTP at your local site via public IP addresses can be
automatically redirected to local servers configured with private IP addresses. In other words,
depending on the requested services, the HH1620 redirects the external service request to
the appropriate server (located at another internal IP address).
NAT – Port Triggering
Triggers are used to deal with application protocols that create separate sessions. Some
applications, such as NetMeeting, open secondary connections during normal operations, for
example, a connection to a server is established using one port, but data transfers are
performed on a separate connection. A trigger tells the device to expect these secondary
sessions and how to handle them.
Once you set a trigger, the embedded IP address of each incoming packet is replaced by the
correct host address so that NAT can translate packets to the correct destination.
HH1620 Wireless VoIP Gateway
User’s Guide
32