IPv6 for Unity iOS Exports

Apple now requires iOS apps to support pure IPv6 connections.
We tested PUN v1.75 and it supports IPv6, including the "Best Region" setting.

If you use the Photon Cloud, you only have to make sure your PUN version is up to date.
If you run a Photon Server, you might have to update.

Test All Builds

Unity's support for IPv6 begins with 5.3.4p4. They posted about adding IPv6 support.

Several versions of Unity do not successfully support IPv6, so you should test each build.

If you get a client-side error like this, your client needs an update;
Connect() to 'x.x.x.x' failed: System.Net.Sockets.SocketException: Network is unreachable in a IPv6 network.

Test Procedure

Read "Test for IPv6 DNS64/NAT64 Compatibility Regularly" to learn how to test IPv6 support easily.

We do this for PUN before release.
Make sure there is not some other plugin failing!

Handling Rejections

We know that some apps got rejected, despite using PUN v1.75.

If your app gets rejected, please get in touch with the Apple review team. Point out that you're using PUN and that we and you both tested the netcode versus their own test procedures.

Explicitly point to their own test-description page. If our tests fail and theirs doesn't, we have to figure out what we have to test! At the moment, it's unclear.

Cloud and Server

The Photon Cloud itself will not be directly available via IPv6 in the short term. Apple's requirement is that clients can cope with IPv6 addresses, if there is a "IP translation", as described in their article.

For anyone using Photon Server (OnPremise), this means, you can likely continue to run it as IPv4 service.
If you want to setup a true IPv6 server, we have some docs for that.



Get Photon Unity Networking in the Asset Store.