Hello Colleagues!
SAP HANA Cloud Integration enables you to connect cloud-based applications to on-premise applications or other cloud-based applications. This blog explores the different options to connect the systems to HANA Cloud Integration. In the first two blogs, we learn about the types of authentication supported in HANA Cloud Integration and then in the later two blogs, learn about the steps for connectivity.
Connectivity tests are the first steps you carry out in an integration project. In the blogs covering the connectivity tests, I have taken an example of an SAP ERP system connecting to HANA Cloud Integration (mainly because, we have many customers wanting to connect their on-premise systems to the cloud). However, the technical know-how and procedure remains valid for any system, so that should not stop you from reading the blogs 
.
Also, this series of blog is written to help the integration team with first steps of connecting their on-premise or cloud systems to SAP HANA Cloud Integration.
Blog 1: Authenticating to HANA Cloud Integration
Blog 2: Authenticating from HANA Cloud Integration
Blog 3: Connectivity tests to HANA Cloud Integration
Blog 4: Connectivity tests from HANA Cloud Integration
Hope the information provided helps you in the integration projects!
Best Regards,
Sujit