HA sync has stopped working how to fix it?

Both units are up, without firewall function. I have disabled and enabled the service on both units but it still is not working.

From the client Protector, the Master shows ports 8898 and 5432 filtered, instead of open. And a telnet session could not be established. This issue could be the reason why it doesn't work.

It is recommended to set filter option so only the ports are open to the Protectors only.