Skip to main content

TOS IPv6 Usage and Configuration Guide

Applicable systems: TOS 6 / TOS 7 (this article uses TOS 7.0 as an example)

1. How to Confirm Whether Your Computer and NAS Network Support IPv6​

Check Whether Your Computer Supports IPv6​

On a computer in the local network, open a browser and visit: Test your IPv6.

Determine based on the test result:

  • IPv6 Connected: This indicates that your network supports public IPv6, and you can continue with the subsequent configuration using IPv6.
  • No IPv6 Detected: The current network does not support IPv6 for the time being. Please check the IPv6 settings of the router, the operator network, or the computer.

TOSHelp_ddns_remote_access_002en.png

Check Whether the NAS Has Obtained an IPv6 Address​

  1. Log in to TOS and open Control Panel → Network → Network Interface.
  2. Locate the network interface currently in use and check the address that has been obtained.

Determine based on the displayed address:

  • Beginning with 2xxx:: This is usually a global unicast IPv6 address, which can be used for IPv6 network communication.

TOSHelp_tos_ipv6_guide_002en.png

  • Beginning with fe80:: This is an IPv6 link-local address and cannot be used to access the NAS from the public network.

TOSHelp_tos_ipv6_guide_003en.png

  • Displayed as ---: This indicates that no IPv6 address has been obtained, or that the IPv6 function is not enabled.

2. How to Enable IPv6 If the NAS Does Not Have It?​

  1. Log in to TOS and open Control Panel → Network → Network Interface.
  2. Locate the network interface to be configured and click Edit.

TOSHelp_tos_ipv6_guide_004en.png

  1. Locate IPv6 Settings and select Obtain an IPv6 address automatically.

TOSHelp_tos_ipv6_guide_005en.png

If the router and the operator already provide an IPv6 network, the NAS can usually obtain an IPv6 address automatically.

3. How to Manually Set an IPv6 Address?​

If your network administrator or operator has provided a fixed IPv6 address, prefix length, and gateway, you can configure them manually.

  1. Open Control Panel → Network → Network Interface.
  2. Locate the network interface to be configured and click Edit.
  3. In IPv6 Settings, select Manual Configuration.
  4. Fill in the IPv6 address, prefix length, and default gateway.

For example:

IPv6 address: 240e:1234:5678:1::10
Prefix length: 64
Default gateway: 240e:1234:5678:1::1

TOSHelp_tos_ipv6_guide_006en.png

Note

The IPv6 address, prefix length, and default gateway must match the current network environment and cannot be filled in arbitrarily. If you do not know these parameters, it is recommended to use Obtain an IPv6 address automatically, or confirm them with your network administrator or operator.

After completing the settings, return to Control Panel → Network → Network Interface to confirm that the network interface has obtained an IPv6 address.

4. Direct Access via a Public IPv6 Address​

  1. PC/Web: In the browser address bar, enter an IPv6 address beginning with 2xxx: along with the port number (for example: https://[240e:xxxx:xxxx::1]:5443). Note that the IPv6 address must be enclosed in square brackets [ ].

TOSHelp_tos_ipv6_guide_007en.jpg

  1. Mobile App: It is recommended to use TNAS mobile for access, because directly entering a complex IPv6 address on a mobile device provides a poor experience, and you also need to ensure that the mobile network supports IPv6.

5. How to Configure IPv6 DDNS?​

The IPv6 address of home broadband may change. If you need long-term access to the NAS from an external network, it is recommended to use IPv6 + DDNS domain name to access the NAS through a domain name, so that you do not need to remember the changed IPv6 address.

Before configuration, confirm the following:

  • The NAS has obtained a usable IPv6 address;
  • The DDNS service provider supports IPv6;
  • You already have the account and domain name provided by the DDNS service provider.

For configuration instructions, refer to: How to Use DDNS for External Access to NAS?

6. FAQ​

Q1: Why does my computer have IPv6, but the NAS does not?

The computer and the NAS are two independent network devices. Please go to Control Panel → Network → Network Interface → Edit and check the IPv6 settings of the corresponding network interface on the NAS.

Q2: The NAS IPv6 address begins with fe80::. Can it be accessed from an external network?

No. An address beginning with fe80: is an IPv6 link-local address, which can only be used for local link communication and cannot serve as the address for accessing the NAS from the public network.

Q3: The NAS has an IPv6 address beginning with 2xxx:. Why is it still inaccessible from an external network?

Please check:

  • Whether the network where the computer or phone accessing the NAS is located supports IPv6;
  • Whether the firewall of the NAS or the network device allows access;
  • Whether the network device restricts inbound IPv6 connections;
  • Whether the access port is correct.

The default Web management port of TOS is 8181. If you have changed the TOS access port, you need to use the modified port.

Q4: Does IPv6 still require port mapping on the router?

Usually, port mapping like that used for IPv4 NAT is not required. Whether the NAS can be accessed from the internet also depends on the firewall and the inbound access policy of the network operator.

Q5: Why does the IPv6 address change?

Home broadband usually uses a dynamic IPv6 prefix, and the operator may reassign the IPv6 prefix, so the IPv6 address of the NAS may change. If you need long-term access to the NAS, it is recommended to use IPv6 + DDNS.