Mobile Connect 5.0.0 not able to connect to IPv4 server from IPv6-only network
Description
Customers who upgrade to Mobile Connect 5.0.0 may encounter a connection error when connecting from an IPv6-only network. To confirm your device is using an IPv6 address open the Mobile Connect app and navigate to Settings | Device Information.
Cause
Steps to reproduce:
- Upgrade the IOS to 11.0.3 and MC to 5.0.0.
- Configure the profile in the MC.
- Try to connect. It stays in "connecting" status.
- After sometime it disconnects.
Resolution
This issue is currently scheduled to be fixed in an upcoming release of Mobile Connect; version 5.0.2.
In the mean time a workaround exists. Access the server by a hostname, rather than by raw IPv4 address. This will require one of the following.
Option 1: Set up a DNS record for the hostname. The record can be an IPv4 record (A), or an IPv6 record (AAAA) if the server also has a native IPv6 address.
Option 2: Use a hostname of "<IP address>.nip.io". Nip.io is a free service which is not operated by SonicWall; please see nip.io - Wildcard DNS for any IP for more info on that service.