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1.1
To be able to use the SINAUT MD740-1...
you require...
1.2
IP address of the remote site
In order that a SINAUT MD740-1 can actively establish a VPN connection the remote
site must have a fixed IP address (an IP address consists of a maximum of 4 numbers,
separated by dots, which can each have up to three digits, e.g. 255.122.201.005). With
many Internet Service Providers (ISPs), however, the IP addresses are assigned
dynamically, i.e. the IP addresses of the computers or networks which have access to
the Internet change. There are 3 ways of obtaining a fixed IP address:
Fixed IP address via
dedicated line to
GPRS
Fixed IP address via
Internet service
provider
Fixed IP address via
DynDNS service
SINAUT MD740-1
•
a subscriber contract with a GSM network operator (e.g. TD1,
Vodafone, E-Plus, O2) that supports GPRS
•
release of the GPRS for the user in question by the network
operator
The communication partner is connected to the GPRS network
via a leased dedicated line. In this case it has normally been
assigned a fixed IP address by the network operator.
The communication partner can be accessed via the Internet and
has been assigned a fixed IP address by the Internet service
provider (the address can be applied for from some Internet
service providers).
To solve the problem of dynamic IP address assignment,
DynDNS services can be used. With this kind of service, the
SINAUT MD740-1, for example, or the remote computer,
regardless of the dynamic IP address it currently possesses, is
accessible via a fixed domain name. Each time the IP address
changes, the SINAUT MD740-1 or the remote computer reports
the new IP address to the DynDNS server, so that the current IP
address is always assigned to the domain name on the DNS
server - see glossary, page 95.
The use of a DynDNS service requires a contract with the
provider concerned, e.g. DynDNS.org or DNS4BIZ.com.
Introduction
9 von 105
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