An Overview of IPv6 on Linode
Updated by Linode Written by Linode
Default IPv6 Configuration
All Linodes are created with one IPv6 address, which is acquired by Stateless Address Autoconfiguration (SLAAC). IPv6 is fully enabled on all of Linode’s supported operating systems and uses hardware-based addressing.
Linode does not offer private IPv6 address allocations. Our IPv6 accounting was designed so that local IPv6 traffic does not count against your transfer quota, so you can use your default IPv6 address as if it were a private IP address.
In order for your Linode to receive its SLAAC address, it must respond to IPv6’s ping protocol.
Please be sure to allow ICMPv6 in your firewall, for example in
-A INPUT -p icmpv6 -j ACCEPT
How to Find Your IPv6 Address
To find your Linode’s IPv6 address, see the Remote Access tab of your Linode’s dashboard or use the
root@localhost:~# ip -6 address 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 state UNKNOWN qlen 1 inet6 ::1/128 scope host valid_lft forever preferred_lft forever 3: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 state UP qlen 1000 inet6 2600:3c02::f03c:91ff:fe24:3a2f/64 scope global mngtmpaddr dynamic valid_lft 2591998sec preferred_lft 604798sec inet6 fe80::f03c:91ff:fe24:3a2f/64 scope link valid_lft forever preferred_lft forever
Line 3 shows the IPv6 loopback interface. This is used for IPv6 traffic within the system, similar to the 127.0.0.0/8 IPv4 address block.
Line 6 is the Linode’s public IP address. You can see it’s in a /64 pool.
Line 8 is the link-local IPv6 address. An IPv6 link-local address is a unicast address that can be automatically configured on any interface. The link-local is usually in the
fe80::/10range. However, in order to comply with RFC 3849, this documentation uses an example in the
If your Linode does not have the correct IPv6 address or any IPv6 address at all, you should verify that you have router advertisements enabled and IPv6 privacy extensions disabled. Your Linode will need to accept router advertisements for SLAAC to function. These settings are properly configured by default in our supported distributions.
Additional IPv6 Addresses
You can request additional IPv6 addresses at any time by opening a support ticket. While default IPv6 addresses are configured automatically, you will need to statically configure each IPv6 address in the pool you request. See our static IP guide for instructions on how to do this.
IPv6 addresses are allocated in pools. The IPv6 pool sizes Linode provides and their respective quantity of IPv6 addresses are below.
You will see where the pool is routed under Public IP Pools on the Linode Manager’s Remote Access tab.
|Pool||Number of addresses|
IPv6 Forwarding and Neighbor Discovery
For security reasons, these features are not available on the Linode network. This is enforced by our network infrastructure, so while it’s possible to change the Linux kernel’s
sysctl parameters of your Linode’s operating system to allow IPv6 forwarding, those changes will have no effect.
You may wish to consult the following resources for additional information on this topic. While these are provided in the hope that they will be useful, please note that we cannot vouch for the accuracy or timeliness of externally hosted materials.
This guide is published under a CC BY-ND 4.0 license.