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--- faq:dyndns [2015/07/20 15:18] – created fachet
+++ faq:dyndns [2021/11/08 16:23] (current) – schmitt
@@ Line 1: / Line 1: @@
-====== DynDNS Problems ======
+====== DynDNS/Remote Access Problems ======
-A common problem with SIM cards is that the router can't be accessed even a service like DynDNS is used.
+A common problem mobile networks is that depending on the SIM cards type the router can't be accessed even a service like //DynDNS// and //port forwarding// is used.
-This problem has nothing todo with the router functionality because it is a general problem with IP networks.
+This problem has nothing todo with the router functionality because it is a general problem with IP networks. In most case the terms static(fixed)/dynamic are mixed up with public/private IP addresses.
-Most likely the SIM card has a dynamic but only a **private** IP address.
+Most likely the SIM card has a //dynamic// but only a **private** IP address and it will not work.
-For using dyndns or similiar you need a **public** IP address
+For using //DynDNS// or //port forwarding// you need a **public** IP address.
+//Port forwarding// will not working because the NetModule router is behing a second router of the mobile operator. Port forwarding in the NetModule router will not solve this because you also would need the port forwarding of the mobile operators router. //DynDNS// will also not work because the NetModule will get a //private// IP which can't be accessed from the internet.
+IP address types have two dimensions which are independent:
-•	**Static** means the IP address never changes as long as you stay with the same provider or same server.
+   * **Static** means the IP address never changes as long as you stay with the same provider or same server. (Fixed IP)
-•	**Dynamic** means the IP address can change from time-to-time.
+  * **Dynamic** means the IP address can change from time-to-time.
-•	**Public** means the IP address can be visited from any computer in the world.
+vs.
-•	**Private** means the IP address can only be used by those on the same network. Private addresses are:
+  * **Public** means the IP address can be visited from any computer in the world.
-o	10.0.0.0-10.255.255.255
+  * **Private** means the IP address can only be used by those on the same network.
-o	172.16.0.0-172.31.255.255
-o	192.168.0.0-192.168.255.255
+Private addresses are not routed an the ranges are:
+  * 10.0.0.0 - 10.255.255.255
+  * 172.16.0.0 - 172.31.255.255
+  * 192.168.0.0 - 192.168.255.255
 Please check if the IP address of the router in the mobile network is in the range of a **private** IP address:
-{{:faq:wwanaddress.jpg|}}
+{{:faq:wwanaddress1.png|}}
+If the router has an **private** IP address remote access with port forwarding will not work. If you need remote access you can use an external VPN Server like the Netmodule NB1600-R Wireline or CloudRouter. See: {{:configuration:the_m2m_cook_book.pdf|Setting up an OpenVPN Server}} and
+{{:configuration:netmodule_remote_access_solutions.pdf|Remote access solutions}}.
+Using services like //whatsmyip.com// will show you another address which is the address of the router of the mobile operator.
-Using services like whatsmyip.com will show you another address which is the address of the router of the operation.
+This is the same situation like having a private DSL-Router (= operators router) at home which has a public and often dynamic (e.g. 79.4.3.2) IP. Local computers (= NetModule router) can't be reached from the Internet because they have a private IPs (e.g. 192.168.1.100). All local routers will report the same public IP if //whatsmyip// is used (79.4.3.2). But looking on the IP address of the computers it will show the private addresses (192.168.1.100).
-This is the same situation like a private DSL-Router at home which has a public (but dynmaic) e.g. 79.4.3.2) IP. If the local computers are on a 192.168.1.0/24

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