Siemens IP-Module User Manual page 34

Establishing access to the device via internet
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connection is interrupted, the newly allocated IP address must be assigned to
your domain name, e.g. <www.myWebCam.de> , so that your device can still be
accessed using your domain name.
Example of access using a dynamic IP address
Requirements:
Your device is part of a local network (LAN) and is connected to internet by a
ROUTER, e.g. a TDSL router.
An ISP (Internet Service Provider) has already allocated you an IP address.
An ISP (Internet Service Provider) has already allocated you a domain name.
You have assigned an IP address to your domain name via a DNS server.
Establishing access to the device via internet
1. Allocate a fixed IP address to your device, e. g. 192.168.100.100. See section
10.1: Changing the device IP address.
2. Set the time and duration of the dynamic IP address change cycle used by the
ISP via the router.
3. Register your domain name with a Domain Name Server (DNS) e.g.
www.DynDns.org, so that the IP address can be assigned to the domain name.
Each time the connection to the ISP is reestablished, your router will be notified
of the new IP address. The router must be configured to notify the DNS of the
new IP address as soon the router receives it.
If it is now attempted to establish a connection to your domain name,
www.myWebCam.de for example, the connection to your router will be built up
via your ISP. The router must be configured to pass all incoming requests to the
device.