Why am I being logged out or receiving an ANERR message while navigating on Business Network? Why can't I login into my Business Network account, instead I receive a blank or time out page?

To ensure you can navigate on SAP Business Network, you must add the following domains to your network firewall or proxy allow list:

*.ariba.com
*.ondemand.com
*.qualtrics.com
*.split.io
*.cloud.sap
*.sap.com
*.openui5.org
*.kaltura.com

SAP Ariba Network is integrated with CDN (Content Delivery Network) which is a network of distributed servers strategically located across various geographic regions, designed to deliver web content to users more efficiently and reliably. In order to access CDN servers, it is required to add *.ariba.com to your network firewall or proxy allow list also. As an alternative, you may replace *.ariba.com with its subdomains below:

service.ariba.com
service-2.ariba.com
certservice.ariba.com
certservice-2.ariba.com
mu.ariba.com
eu.mu.ariba.com
service-eu.ariba.com
cdn.us.bn.cloud.ariba.com
portal.us.bn.cloud.ariba.com
portal.eu.bn.cloud.ariba.com
api.us.bn.cloud.ariba.com

This could also be caused by the IP addresses configured on your internal infrastructure. Please, see Why was my session terminated for security reasons? (IP address discrepancy) for further details on this.

SAP Business Network for Procurement & Supply Chain > Administration (Buyer & Supplier Account Administration)