The following are the IP addresses of Synatic which are based on the region.
You can copy the IP address according to your region and whitelist it to establish a public connection to Synatic.
US:
23.21.172.5
54.85.118.216
CA:
3.97.137.146
35.182.2.72
EU:
34.253.128.48
52.49.230.151