Friday, 11 March 2016

IPv6 important for iOS device wifi synchronisation with iTunes

Lots of people have problems with their iPhones and iPads not syncing with iTunes over wifi.  One thing that can stop this working is if there is a problem with IPv6 between the iTunes server and the iOS device.

The iOS device will always have IPv6 enabled but it is possible e.g. on Mac OS X to disable it.

I recently came across this problem after restricting access to Mac OS X server to only 'private networks' at the top level.  This should not cause a problem but it seems to stop IPv6 working.  By allowing 'all networks' the problem was fixed.  It is possible to restrict access on a service by service basis.  This problem was discovered by someone else but I can't find the link now.