Simplesat uses AWS servers located in Ireland.
The current IP addresses for our API servers are:
54.216.242.254
18.202.111.236
18.185.231.228
3.77.48.46
3.74.172.161
99.81.99.204
54.216.226.109
54.217.132.208
You may need to whitelist these addresses and/or update your geo-IP filter when authenticating with ConnectWise, Zendesk, and some other services.