Mobile Wi-Fi router "Aterm MR03LN" now supports IPv6 with an update! Thinking about Security Issues While Enjoying IIJmio's IPv6 Service [Eiichi Yoshikawa's "Some Deep Things About Smartphones"] - S-MAX

The mobile Wi-Fi router "Aterm MR03LN" has been updated to support IPv6! Thinking about Security Issues While Enjoying IIJmio's IPv6 Service [Eiichi Yoshikawa's "Some Deep Things About Smartphones"]

August 04, 2014 11:55 posted by Edolist

For mobile communication The wave of IPv6 is

NEC Platforms (formerly NEC Access Technica)'s mobile Wi-Fi router "Aterm MR03LN" is updated to the next generation Internet standard "IPv6" (Note: As of August 4, update distribution has been suspended due to a problem). Support for IPv6 is progressing mainly in fixed broadband, but the current situation is that the spread of IPv6 in mobile communications in Japan is lagging behind. Therefore, in this series of articles, "A little depth of smartphones", we will review IPv6 communication by combining IPv6 compatible mobile communication service "IIJmio High Speed ​​Mobile / D Service" and AtermMR03LN, and introduce IPv6 to mobile communication. We will introduce the security issues that are highlighted by this.

Devices that connect to the Internet are assigned an IP address, which is an address on the network. IPv4 (Internet Protocol Version 4), a widely used communication method, can use a maximum of 4.3 billion (*1) IP addresses, but due to the spread of Internet use, there are no IPv4 addresses that can be assigned. (*2). Therefore, IPv6 (Internet Protocol Version 6), which allows virtually unlimited IP addresses (*3), has been introduced. For example, the websites of Google and Facebook already support IPv6 access.

*1: IPv4 addresses are 32 bits long, so 2^32 addresses are available.

*2: With the introduction of technology that allows multiple users to share IPv4 addresses, the situation where the Internet can no longer be used immediately has been avoided, but there is no doubt that it is a temporary measure.

*3: IPv6 addresses are 128 bits long, so 2^128 addresses are available.

Let's start using IPv6. IIJmio Kosoku Mobile/D Service supports IPv6 as standard, and no additional application is required. By selecting "IPv4/IPv6" as the connection method in the connection settings (LTE/3G) of the Aterm MR03LN, IPv6 communication becomes possible.

Enable IPv6 by selecting "IPv4/IPv6"

Devices (supporting IPv6) connected via Wi-Fi to Aterm MR03LN with IPv6 enabled can communicate using IPv6 (this article I'm using an iPhone 5). Even if IPv6 is enabled, if the communication partner (website, mail server, etc.) does not support IPv6, communication will continue using IPv4 as before. Switching is automatic, so users can use IPv6 and IPv4 without being aware of the difference.

Displayed contents of the confirmation site "IPv6 test". IPv6 address is displayed

In IPv4, one IP address is often shared by multiple users or devices in order to make effective use of limited IP addresses. Due to its virtually unlimited availability, every device is generally assigned a unique IP address. Therefore, it is possible to communicate with a specific device from the outside by specifying an IPv6 address.

Aterm MR03LN does not accept IPv6 communication from the outside by default by "IPv6 packet filter". But what if there is no IPv6 packet filter? For verification this time, I will change the settings of Aterm MR03LN so that the IPv6 packet filter does not work.

By changing the settings of Aterm MR03LN, all IPv6 communication is set to pass through

In this state, specify the IPv6 address assigned to the iPhone and confirm that you can communicate with the iPhone from your home PC (IPv6 compatible) Did.

You can communicate with your iPhone using IPv6 from your home PC

The ability to specify an IP address and communicate with a specific device from outside simplifies Internet communication and enables convenient functions such as P2P. . However, on the other hand, it also means that attacks can be launched from the outside as long as the IP address is known, so appropriate defensive measures such as IPv6 packet filters must be taken.

Considering that IPv4 addresses are already exhausted, there is no doubt that the introduction of IPv6, including mobile communications, will be necessary in the long term, but we will also surely deal with new security risks due to IPv6. must be We would like to ask business operators to firmly implement security measures so that users can use the Internet safely without being conscious of the transition to IPv6.

Article writing: Edo (Eiichi Yoshikawa) Related links ・S-MAX ・S-MAX smaxjp on Twitter ・S-MAX - Facebook page ・Aterm MR03LN (AtermStation) ・High-speed mobile / D About IPv6 (IIJmio) / IPv6 test / Series "Eiichi Yoshikawa's 'A little depth of smartphones'" List of articles - S-MAX How are you feeling today? Tweet

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