Although IPv4 is the most common access protocol to the World Wide Web and data transfer medium (at least for Windows systems), the new development of the sixth version with the declared support in the latest Windows operating systems looks much more preferable. But! The catch is that often the user receives a message that IPv6 is being used without access to the Internet.
What is IPv6?
Consideration of the issue related to IPv6 should begin with the basics, that is, with an understanding of what it is all about.
Briefly and clearly, this is the system responsible for generating, assigning and distributing unique static and dynamic IP addresses to computer terminals scattered around the world using a DHCP server, so that no address is ever repeated. In principle, all currently known distribution protocols work on this principle. But IPv6 is considered the most promising of all of them. Without access to the Internet today, few people imagine themselves, the number of computers or the same mobile devices has grown so much that the existing system is simply not able to generate new addresses.
IPv6 vs IPv4: benefits
Now let's dig a little bit into history. Initially, a protocol of this type was created back in the 70s of the last century and received the abbreviation IPv4. With the then population of the Earth (just over five billion), no one seriously thought about the fact that this system is able to create just four billion addresses. It was believed that this is enough for all generations.
The protocol itself implied the use of a 32-bit address, consisting of eight digits. Thus, it was possible to generate as many identifiers. As it turned out, IPv4 turned out to be inefficient (although it is still used). The fact is that the amount of mobile equipment that has increased in recent years has puzzled developers (each device must be assigned a unique, never-repeated external and internal identifier).
It was then that the understanding came that the system needed to be replaced. First, the ST / ST2 protocol was created, which was unofficially named IPv5. In practice, it has not received distribution. Unless it was used as an add-on to IPv4, and then only by some companies that tested it.
A global breakthrough is IPv6 technology, which involves generating an IP address of 128 bits in length. If someone else has not understood, the options for creating unique combinations here are millions of times more. In general, according to many leading experts, the number of generated addresses is practically unlimited.
Note that the protocol itself, no matter how surprising it sounds, was developed back in the early 90s, and received distribution and software support only now, and then not all providers. Thus, if a user sees a notification that IPv6 is installed in the system without access to the Internet, it may be very likely that the provider itself does not support such access technology to the Network. In other words, he simply does not have a DHCPv6 server installed, which is responsible for all addresses.
Protocol activation
Now let's get down to practical steps. We begin the statement of the problem with the condition that we have IPv6 setup without access to the Internet. Windows 7 and above allow you to use these settings, but only on condition that access support is provided at the provider level. Otherwise, all configuration steps will be meaningless.
To get started, you need to follow a few simple steps to make sure that the protocol is really activated. To do this, in the command line (Win + R + cmd), specify ipconfig for a single terminal user or ipconfig / all for machines located on the local network and directly connected to this computer. If IPv6 is not displayed on the screen, go to the system setup.
IPv6 without Internet access: what to do?
Firstly, in the properties of network connections selected from the standard control panel, you should put a “tick” in the protocol activation line (access can be made much easier if you enter the ncpa.cpl command in the Run menu).
Now you need to use the properties button located at the bottom right. In the window that opens, our desired settings will appear.
Common Settings
As a rule, if the provider has an active DHCPv6 server running on its own network, there should be no problems.
The settings for obtaining the IP address and DNS server are set on the machine. The server itself will distribute addresses to the machines connected to it.
Manual parameter setting
If for some reason this is not possible, you can try to use manual settings. In this case, it is worth paying attention that the address of a specific terminal should not coincide with the address of the router. In the router, the unit is the last digit, but for the computer you can set, for example, the value 10, 100 or 101 - as you like. Anyway, the range of addresses is in the range from 0 to 256.
It is worth noting also the fact that in a situation where we have an active connection via IPv6 without access to the Internet, Windows 8 or any other system may require an alternative configuration, the settings of which are most often associated with the introduction of the correct DNS server addresses.
IPv6 without Internet access: how to fix the situation on different OS and for different operators
As for alternative settings for any operating systems, here you should know a few nuances. For example, it is advisable to activate the protocol in the e-book using the following commands:
Netsh (then Enter) - Interface (then Enter) - ipv6 (then Enter) - install (Enter again).
But that is not all. In some cases, it may be necessary to specify the address of the preferred and alternative DNS server in manual mode. Immediately it is worth paying attention to the fact that the address will consist of sixteen digits and should not even be configured according to the provider of the provider services.
So, for example, the most common and, so to speak, working configuration is considered to be the setting of Google services, in which in the address setting the last four digits can be either four eights, or two eights and two fours. For the Yandex service, even worse. There it will be necessary to prescribe such combinations of letters and numbers that the user, as they say, will go around spinning.
Now consider some special cases. So, we have activated IPv6 protocol without access to the Internet. We will take Rostelecom as an initial example. In this case, the problem, again, boils down to just indicating the correct server addresses (we are not talking about a possible reboot of the router, set-top box, or any other device).
In the DNS address bar, you can write either eights and fours, as indicated above, or use the settings for Yandex, which involve entering the value 77.88.8.8. It works without problems.
And a few more words about IPv6 (without access to the Internet). ByFly, for example, (Belarusian operator) has a lot of communication problems. As follows from user reviews, the connection speed is usually limited to a limit of 600 kbit / s (if fiber is not installed). You understand that with this quality, there is no need to talk about any settings that could significantly affect bandwidth. Although at the cable factory, the speed rarely exceeds 50 Mbps, whatever they say.
However, as an option, the above parameters can be used. Separately, it is worth noting that in some cases when creating a connection you will have to use unencrypted protocols and passwords, namely PAP and CHAP. Alas, the security of such connections raises legitimate doubts.
Health Check
Finally, we will assume that all the settings are correct. Now it remains to check whether the protocol actually works.
To do this, again, use the command line with ipconfig. After all the procedures, the protocol with the assigned address will be displayed on the screen. Don't like that? You can go to the sharing control center and networks and look at the connection status. In extreme cases, you can simply click on the connection icon in the system tray (for example, if Wi-Fi is used) and go to the desired menu.
Instead of an afterword
It remains to add that IPv6 without access to the Internet (network) is not the biggest problem of modern users who use IPv4 protocol at home / office terminals or local servers . In fact, by default, the IPv6 system, although claimed to be supported by the same Windows systems, is nonetheless deactivated so as not to create unnecessary difficulties for users.
For that matter, the issue of activating and configuring this protocol is relevant only if this technology is supported by the operator providing the provider services. Otherwise, you can not even try to configure something.