Using ezTCP in various environments
Nowadays, we use IPv4 using 32bit length. This can make a lot of addresses but not enough to allow all of the devices to access the Internet. Because of this, IPv6 system has been raised and will be used soon. However, in many points like interfacing with previous system, it’s going to be needed a lot of effort and time. For these reasons, the protocols which assign the dynamic IP address have appeared and it is widely used throughout the world. These protocols grant an IP address to using devices, or revoke it for effective use of IP address. Even if the type may be different, most of PC in your home are used this system. This means the IP address what I am using is not would be guaranteed tomorrow. The system is definitely needed in point of solution with lack of IP addresses, on the other hand, it will be more complicated for system using IP address like socket communication program.
ezTCP supports two protocols mentioned. This means ezTCP can be operated in environment of dynamic IP address. Except this matter, however, it’s possible to be connected to internet or impossible according to types and of IP allocate and kind of IP address. This post let you use ezTCP easily in any kind of situation.
Cases of IP address
|
Classification |
Client | |||||
|
Public |
Private | |||||
|
Static |
Dynamic |
Static(R) |
Dynamic(R) | |||
|
Server |
Public |
Static |
A |
B | ||
|
Dynamic |
C |
D | ||||
|
Private |
Static(R) |
E |
F | |||
|
Dynamic(R) |
G |
H | ||||
F In above, mark of (R) means IP share router’s IP address because the cases have to use the router. Remember that it is not present the IP address of ezTCP.
Conditions of Internet Communication
ID
Condition
Server
Client
A
-
-
B
-
Using Port Forwarding
C
Using DDNS
-
D
Using DDNS
Using Port Forwading
E
Using Port Forwading
-
F
Using Port Forwading
Using Port Forwading
G
Using Port Forwading and DDNS
-
H
Using Port Forwading and DDNS
Using Port Forwading
ID
Condition
Server
Client
A
-
-
B
-
Using Port Forwarding
C
Using DDNS
-
D
Using DDNS
Using Port Forwading
E
Using Port Forwading
-
F
Using Port Forwading
Using Port Forwading
G
Using Port Forwading and DDNS
-
H
Using Port Forwading and DDNS
Using Port Forwading
Configuration Examples of each case
Remember that two public IP addresses are needed to be connected with Internet.
If you have, ezTCP can be used all of the world.
Please refer to the docuent for the details about IP address and ezTCP.
[IP address and ezTCP]
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