The following IP addresses must be allowed at the firewall for testing and production transactions:
IP test: (for testing api transaction on a testing not real transactions)
IP live: (for making real transaction on production environment)

IP test:

3.123.194.128

3.124.62.248

18.198.97.252

3.75.43.49

18.156.94.176

IP live:

18.158.107.17

3.121.149.170

3.76.166.104

3.69.160.29

3.78.79.166

3.71.221.153

3.78.131.18

3.67.110.47

18.192.112.151

52.59.95.229

18.158.145.146

3.75.128.58

3.78.28.179

3.122.21.187

3.66.126.119

35.158.249.118

52.29.70.254

52.59.159.234

3.76.183.119

18.157.106.67

18.156.94.176

18.197.238.68

3.66.129.154

3.77.123.153

3.70.40.72