This page lists different measures we take to maintain security and service levels. Please read carefully and follow the instructions, especially where changes may happen any time. If you do not update your settings when a change occurs, you might risk your Barion implementation's ability to work properly or at all.
It makes sense to limit the range of IP addresses where the merchant's server accepts callback requests from.
As of 2017.11.23 the callback request will come from this IP Address: 220.127.116.11
If the IP address changes, we publish the list of new IP addresses here and notify our developers and merchants in the Facebook group (See: Support) and in a newsletter, sent to the merchant's e-mail used at registration.