1. Secure connection to customer’s network eg: connect via VPN/Citrix
Using this method, you allow the customers at the remote site to connect to the network with the help of the VPN sotware (SonicWall, Juniper) so on after an authentication. multiple users as well as multiple systems can be connected
2. Secure connection to SAP
SAP support team to connect to your network. This needs some knowledge in setting up the SAPRouter.