A Guide for Understanding 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 network 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
iptables, you can issue the following commands:
ip6tables -A INPUT -p icmpv6 -j ACCEPT ip6tables -A FORWARD -p icmpv6 -j ACCEPT
How to Find Your IPv6 Address
You can find your Linode’s IPv6 address using the Linode Cloud Manager or the
ip tool with the Linux Terminal.
Linode Cloud Manager
Log in to your Linode Cloud Manager account and select the Linodes link in the sidebar to view a list of all your Linodes.
On the Linodes page, under the IP Addresses column, you can quickly view each Linode’s IP addresses.
To see a more detailed view, select the Linode whose IPv6 address you would like to find and click on its Networking tab.
Under the IPv6 section, you can view the Linode’s SLAAC and Link Local IPv6 addresses.
Using your terminal, SSH into the Linode whose IPv6 address you would like to find.
iptool to find your Linode’s IPv6 address:
[email protected]:~# 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,
::1/128. This is used for IPv6 traffic within the system, similar to the
127.0.0.0/8IPv4 address block.
Line 6 is the Linode’s public IP address,
2600:3c02::f03c:91ff:fe24:3a2f/64. You can see it’s in a
Line 8 is the link-local IPv6 address,
fe80::f03c:91ff:fe24:3a2f/64. An IPv6 link-local address is a unicast address that is automatically configured on any interface.
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 range you request. See our static IP guide for instructions on how to do this.
IPv6 Prefixes and Pools
/116prefix is not available in the Toronto or Mumbai data centers.
IPv6 addresses are allocated in blocks. These are indicated with a slash
/ followed by a number in base 10, the length of the network prefix in bits. This translates to the number of available addresses in the pool. For example, the prefix
/48 contains 2128-48 = 280 = 1,208,925,819,614,629,174,706,176 addresses. For an address like
2001:db8:1234::/48 the block of addresses is
The IPv6 prefixes and their respective quantity of IPv6 addresses that Linode provides are listed below.
|Prefix||Number of Addresses in Pool|
For security reasons, IPv6 forwarding is not available on the Linode network. This is enforced by our network infrastructure.
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.
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This guide is published under a CC BY-ND 4.0 license.