Cannot connect to Synology NAS via quick connect

For some reason I cannot access my Synology NAS remotely using quickconnect. It used to work.

Occurred when I went from cable to NBN

Telstra changed my DSM DNS servers

FIXED

Set DSM dns to 8.8.8.8 and 8.8.4.4 respectively

Temporarily disable DSM Firewall and check access

Enable DSM Firewall and check access again