Step 1: Access the LianLian Global Portal by visiting https://merchant.lianlianpay.co.th/user/login and log in with your credentials. If you're a first-time user, follow the registration instructions provided on the site.
Note: If this is merchants first time logging in, please get them to register their account using either the email address or mobile number they used during registration.
Step 2: On the left-side menu, locate and select the "Dev Config" option under the "Developers" section.
Step 3: On the right side of the screen, scroll down until you find the "IP Whitelist" section. In this section, input the following IP address: 34.142.223.254 and click Save.