Scripting firewall rules

I would like to automate the add of firewall rules inside sophos UTM 9 (software appliance). The idea is, once we have detect a suspicious IP into our network  to block it for good.

On my existing router, I am able to telnet the device and run a list of command to add a firewall rule in.

Can this be done with Sophos? 

i am trying to connect bia SSH and currently stuck with this but as soon as this will be done, do you know what is the command to run to add a firewall rule to bloack all traffic from a given IP address ? 

Thanks