Rebooting the firewall has allowed connections to be made once again. The root cause of the problem will continue to be investigated.
Posted Jan 04, 2021 - 19:54 AEDT
Update
A scheduled reboot of the firewall causing the issue will take place tonight (4th Jan 2021) at 19:30 AEDST. Existing connections to the system at this time may be affected. It is advised that anyone connected at this time to please disconnect your sessions prior.
Posted Jan 04, 2021 - 14:33 AEDT
Update
We are continuing to work on a fix for this issue.