Справочник Пользователя для Insys GPRS 5.0 Ethernet 11-02-01-03-10.018
Модели
11-02-01-03-10.018
Functions
INSYS GPRS 5.0 Ethernet
36
Dez-06
After the entries were stored and the INSYS GPRS 5.0 Ethernet was restarted, the lo-
cal web server is available via the public IP address of the INSYS GPRS 5.0 Ethernet (in
the example: 84.142.35.215). For the client computer with web browser it seems as if
the INSYS GPRS 5.0 Ethernet is the called up web server.
Any local server application, which supports the TCP or UDP protocol, can therefore
be addressed from the public network.
cal web server is available via the public IP address of the INSYS GPRS 5.0 Ethernet (in
the example: 84.142.35.215). For the client computer with web browser it seems as if
the INSYS GPRS 5.0 Ethernet is the called up web server.
Any local server application, which supports the TCP or UDP protocol, can therefore
be addressed from the public network.
Note
Each WAN port can only be used once for the TCP as well as for
the UDP protocol. It is possible to use a certain WAN port for
TCP as well as for UDP, but it is not possible to use the same
WAN port with the same protocol for several entries.
Each WAN port can only be used once for the TCP as well as for
the UDP protocol. It is possible to use a certain WAN port for
TCP as well as for UDP, but it is not possible to use the same
WAN port with the same protocol for several entries.
5.4.2
Operation with GPRS
To enable port forwarding, which means incoming connections with the INSYS GPRS
5.0 Ethernet, the following is required:
The network provider must enable incoming connections
The WAN IP address of the INSYS GPRS 5.0 Ethernet is recognized
In many GPRS networks, incoming connections are not permitted by default to pro-
tect the GPRS terminal from unwanted data traffic (load and cost). In some countries
public APNs without any protection are offered, too. Using these APNs can lead to in-
calculable costs during the device’s operation.
As an alternative, GPRS providers offer VPN services which permit incoming connec-
tions from predefined IP addresses. Fixed IP addresses are possible within the
framework of VPN or special arrangements.
Especially suited are additional services like “fixed.IP” from mdex
(http://www.mdex.eu), which sum up different SIM cards to a closed private net-
work with a private IP address range. Connections from a companies’ network to the
devices are then set up via a VPN tunnel
Usually, the GPRS provider allocates the GPRS device a new dynamic IP address for
each dial-in and every 24 hours, which the GPRS device may need to communicate to
potential callers. Furthermore, the INSYS GPRS 5.0 Ethernet may be allocated a fixed
hostname (e.g. gprsrouter.dyndns.org) via the DynDNS service. The INSYS GPRS 5.0
Ethernet will transfer its currently allocated WAN IP address to the DynDNS service
during each dial-in into the GPRS network. The DynDNS service will assign this IP ad-
dress to the according hostname (FQDN - "Full Qualified Domain Name. After each
GPRS dial-in, the INSYS GPRS 5.0 Ethernet will thus be available via its hostname,
provided that the network provider supports incoming connections. Please find more
information regarding this topic in the DynDNS configuration in the Chapter
DynDNS Configuration.
5.0 Ethernet, the following is required:
The network provider must enable incoming connections
The WAN IP address of the INSYS GPRS 5.0 Ethernet is recognized
In many GPRS networks, incoming connections are not permitted by default to pro-
tect the GPRS terminal from unwanted data traffic (load and cost). In some countries
public APNs without any protection are offered, too. Using these APNs can lead to in-
calculable costs during the device’s operation.
As an alternative, GPRS providers offer VPN services which permit incoming connec-
tions from predefined IP addresses. Fixed IP addresses are possible within the
framework of VPN or special arrangements.
Especially suited are additional services like “fixed.IP” from mdex
(http://www.mdex.eu), which sum up different SIM cards to a closed private net-
work with a private IP address range. Connections from a companies’ network to the
devices are then set up via a VPN tunnel
Usually, the GPRS provider allocates the GPRS device a new dynamic IP address for
each dial-in and every 24 hours, which the GPRS device may need to communicate to
potential callers. Furthermore, the INSYS GPRS 5.0 Ethernet may be allocated a fixed
hostname (e.g. gprsrouter.dyndns.org) via the DynDNS service. The INSYS GPRS 5.0
Ethernet will transfer its currently allocated WAN IP address to the DynDNS service
during each dial-in into the GPRS network. The DynDNS service will assign this IP ad-
dress to the according hostname (FQDN - "Full Qualified Domain Name. After each
GPRS dial-in, the INSYS GPRS 5.0 Ethernet will thus be available via its hostname,
provided that the network provider supports incoming connections. Please find more
information regarding this topic in the DynDNS configuration in the Chapter
DynDNS Configuration.