Google compute cloud instances are protected by a firewall which does not allow the Aspera FASP udp channel by default. You can use an internal tool 'gcloud', built into the CentOS image, to open up the firewall. In order to use Gcloud utility, you need to provide your image access to gcloud on first boot. This is one of the advanced configurations available when provisioning.
To enable this, issue the following command from within the affected instance:
# gcloud compute firewall-rules create allow-fasp-data --description "fasp data channel" --allow udp:33001
If you are running ssh on port 33001, you will also need to open up access:
# gcloud compute firewall-rules create allow-fasp-ssh --description "fasp ssh channel" --allow tcp:33001
If you need to access the Node API, you will also need to open up access:
gcloud compute firewall-rules create allow-node-api --description "node api channel" --allow tcp:9092
More information about Google cloud instance firewall rules is available here: