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+title: Vendor information for IPv6 compatibility:  [draft]
+---
+pub_date: 2019-11-21
+---
+author: ungleich
+---
+twitter_handle: ungleich
+---
+_hidden: no
+---
+_discoverable: yes
+---
+abstract:
+How to make your hardware IPv6 compatible
+---
+body:
+
+Here at [ungleich](https://ungleich.ch) we see many different devices
+and software running or not running in IPv6 only networks. This
+article summarises some features we see required in IPv6 compatible
+devices (including software).
+
+Devices that don't fully complain with the checklist below will be
+removed in the near future from our infrastructure, as their
+maintenance cost has become too high.
+
+The wording is orientated on
+[RFC2119](https://tools.ietf.org/html/rfc2119).
+
+**This document is an early draft - version 0.1**.
+If you have any comments / improvements,
+!please help us to improve it on the [IPv6 Chat](https://IPv6.chat).
+
+## IPv6 autoconfiguration
+
+All devices must assign themselves an IPv6 address upon receival of a
+router advertisement (compare
+[RFC4861](https://tools.ietf.org/html/rfc4861)).
+
+## IPv6 listener
+
+If the device is providing any service, all services **must** bind to
+IPv6 sockets (compare
+[RFC3493](https://tools.ietf.org/html/rfc3493)). Device **may** also
+bind to IPv4 sockets.
+
+## Outgoing connections
+
+All devices **must** support requesting **all** resources via IPv6
+only connections. This does not imply that the vendor resource has to
+be reachable by IPv6, as the network operator might provide a NAT64
+service. Devices **may** also try connecting by IPv4.
+
+## Support for IPv6 DNS servers via router advertisements
+
+All devices **must** read the DNS server and and DNS search path from the
+router advertisements and **must** configure the DNS servers and DNS
+search path accordingly.
+
+
+## Full NAT64/DNS64 compatibility
+
+All devices **must** be fully compatible to reach the IPv4 Internet
+through the means of NAT64 and DNS64. In particular all outgoing
+connections **must** be possible by IPv6 only, even if resources in
+the IPv4 Internet are requested.
+
+
+## No hardcoded IPv4 addresses
+
+IF your device needs to connect to a service (f.i. for updates,
+reporting, etc.), it **must not** have any hardcoded IPv4 address.
+
+## Updates
+
+IF a device is receiving software updates, it **must** be able to receive
+software updates in IPv6 only networks.