Sap Btp Connectivity

---
name: sap-btp-connectivity
description: |
  This skill provides comprehensive knowledge for SAP BTP Connectivity, including the Destination Service, Connectivity Service, Cloud Connector, Connectivity Proxy, and Transparent Proxy for Kubernetes. It should be used when configuring destinations, setting up cloud-to-on-premise connectivity, implementing principal propagation, deploying connectivity proxies in Kubernetes/Kyma environments, or troubleshooting connectivity issues.

  Use this skill when:
  - Creating or configuring SAP BTP destinations (HTTP, RFC, LDAP, MAIL, TCP)
  - Setting up Cloud Connector for on-premise connectivity
  - Implementing OAuth authentication flows for destinations
  - Configuring principal propagation or user propagation
  - Deploying Connectivity Proxy or Transparent Proxy in Kubernetes
  - Troubleshooting connectivity errors (405, 407, 503)
  - Setting up high availability for Cloud Connector
  - Configuring multitenancy for destinations

  Keywords: SAP BTP, Connectivity, Destination Service, Cloud Connector, Connectivity Proxy, Transparent Proxy, Kyma, Kubernetes, OAuth, Principal Propagation, RFC, LDAP, on-premise, hybrid connectivity, service channels, SOCKS5, reverse proxy, tunnel
license: GPL-3.0
metadata:
  version: "1.1.0"
  last_verified: "2025-11-27"
---

# SAP BTP Connectivity Skill

## Related Skills

- **sap-btp-cloud-platform**: Use for platform fundamentals, BTP account setup, and integration patterns
- **sap-btp-best-practices**: Use for implementation guidance, security best practices, and production deployment
- **sap-cap-capire**: Use for CAP service connectivity, destination consumption, and secure API access
- **sap-fiori-tools**: Use for configuring Fiori app destinations and frontend connectivity
- **sap-abap**: Use when connecting to ABAP systems via RFC or implementing principal propagation

## Table of Contents

1. [Overview](#overview)
2. [Quick Start](#quick-start)
3. [Connectivity Scenarios](#connectivity-scenarios)
4. [Destination Types](#destination-types)
5. [Authentication Configuration](#authentication-configuration)
6. [Cloud Connector Setup](#cloud-connector-setup)
7. [Kubernetes/Kyma Connectivity](#kuberneteskyma-connectivity)
8. [Common Issues & Troubleshooting](#common-issues--troubleshooting)
9. [Security Best Practices](#security-best-practices)
10. [Critical Rules](#critical-rules)
11. [Bundled Resources](#bundled-resources)

---

## Overview

SAP BTP Connectivity provides secure access from SAP BTP applications to remote services across cloud, on-premise, and VPC environments.

### Core Components

| Component | Purpose |
|-----------|---------|
| **Destination Service** | Manages connection metadata, authentication, routing |
| **Connectivity Service** | Enables Kubernetes workloads via Cloud Connector |
| **Cloud Connector** | Reverse proxy for secure on-premise tunneling |
| **Connectivity Proxy** | Kubernetes component for on-premise access |
| **Transparent Proxy** | Kubernetes component for unified destination access |

**Supported Environments**: Cloud Foundry, ABAP Environment, Kyma  
**Supported Protocols**: HTTP/HTTPS, RFC, TCP (SOCKS5), LDAP/LDAPS, Mail

---

## Quick Start

### Create HTTP Destination (Cloud Foundry)

1. Navigate: **Connectivity > Destinations** in BTP Cockpit
2. Select: **Create > From Scratch**
3. Configure:
   ```
   Name: my-destination
   Type: HTTP
   URL: [https://api.example.com](https://api.example.com)
   ProxyType: Internet
   Authentication: OAuth2ClientCredentials
   clientId: <your-client-id>
   clientSecret: <your-client-secret>
   tokenServiceURL: [https://auth.example.com/oauth/token](https://auth.example.com/oauth/token)
   ```

### Set Up Cloud Connector

1. Download from [SAP Tools](https://tools.hana.ondemand.com/#cloud)
2. Access: `[https://localhost:8443`](https://localhost:8443`)
3. Login: `Administrator` / `manage` (change immediately)
4. Add subaccount connection

### Access Destination in Application (Node.js)

```javascript
const { getDestination } = require('@sap-cloud-sdk/connectivity');
const destination = await getDestination({ destinationName: 'my-destination' });
```

---

## Connectivity Scenarios

### Cloud-to-Cloud
```
ProxyType: Internet
Authentication: OAuth2ClientCredentials | OAuth2SAMLBearerAssertion
```

### Cloud-to-On-Premise
```
ProxyType: OnPremise
Authentication: BasicAuthentication | PrincipalPropagation
```
Requires Cloud Connector installation in on-premise network.

### On-Premise-to-Cloud (Service Channels)
For on-premise systems accessing SAP BTP services via Cloud Connector.

---

## Destination Types

| Type | Use Case | ProxyType | Common Authentication |
|------|----------|-----------|----------------------|
| **HTTP** | REST/OData APIs | Internet/OnPremise | OAuth2, Basic, Certificates |
| **RFC** | SAP systems | OnPremise | Basic, PrincipalPropagation |
| **LDAP** | Directory services | Internet | Basic, NoAuth |
| **MAIL** | Email protocols | Internet | Basic, NoAuth |
| **TCP** | Generic TCP | OnPremise | Basic |

**Detailed configuration**: See `references/http-destinations.md`, `references/rfc-destinations.md`, `references/mail-tcp-ldap-destinations.md`

---

## Authentication Configuration

### OAuth2ClientCredentials (Service-to-Service)
```
Authentication: OAuth2ClientCredentials
clientId: <client-id>
clientSecret: <client-secret>
tokenServiceURL: [https://auth.example.com/oauth/token](https://auth.example.com/oauth/token)
```

### OAuth2SAMLBearerAssertion (User Propagation)
```
Authentication: OAuth2SAMLBearerAssertion
audience: <target-audience>
clientKey: <client-key>
tokenServiceURL: [https://auth.example.com/oauth2/token](https://auth.example.com/oauth2/token)
KeyStoreLocation: <certificate-location>
```

### PrincipalPropagation (On-Premise SSO)
```
Authentication: PrincipalPropagation
ProxyType: OnPremise
```
Requires Cloud Connector X.509 certificate generation.

**Complete reference**: `references/authentication-types.md` (all 17+ types)

---

## Cloud Connector Setup

### Installation
- **Production**: Windows MSI/Linux RPM packages (service registration)
- **Development**: Portable archive (manual execution)

### Initial Configuration
1. Access UI: `[https://<hostname>:8443`](https://<hostname>:8443`)
2. Login: `Administrator` / `manage`
3. **Change password immediately**
4. Select mode: Master or Shadow
5. Add subaccount connection

### Access Control
Configure on-premise resource access:
- **Backend Types**: ABAP System, SAP Gateway, Non-SAP System, SAP HANA
- **HTTP Access Control**: System mapping + resource paths + policies

### High Availability
- **Master-Shadow**: Primary + backup with synchronized config
- **Requirements**: Stable network, separate machines, identical versions

**Complete guide**: `references/cloud-connector.md`

---

## Kubernetes/Kyma Connectivity

### Connectivity Proxy
Enables Kubernetes workloads to access on-premise systems.

**Installation**:
```bash
helm install connectivity-proxy \
  oci://registry-1.docker.io/sapse/connectivity-proxy \
  --version <version> --namespace <namespace> -f values.yaml
```

### Transparent Proxy
Exposes BTP destinations as Kubernetes Services.

**Installation**:
```bash
helm install transparent-proxy \
  oci://registry-1.docker.io/sapse/transparent-proxy \
  --version <version> --namespace <namespace> -f values.yaml
```

**Usage**: Create Destination Custom Resource, access as Kubernetes Service.

**Complete configuration**: `references/kubernetes-connectivity.md`

---

## Common Issues & Troubleshooting

### HTTP Error Codes

| Code | Cause | Solution |
|------|-------|----------|
| **400** | Malformed request | Check request syntax |
| **401** | Authentication failure | Verify credentials/tokens |
| **405** | HTTPS instead of HTTP | Use `[http://`](http://`) with port 20003 |
| **407** | Missing authorization | Add `Proxy-Authorization: Bearer <token>` |
| **503** | Cloud Connector offline | Check CC connection and Location ID |

### Cloud Connector Issues

**Cannot connect to subaccount**:
- Verify region host URL
- Check firewall allows outbound HTTPS
- Verify subaccount credentials

**Access denied to resource**:
- Check access control configuration
- Verify virtual host mapping
- Check resource path policy

**Complete troubleshooting**: `references/troubleshooting.md`

---

## Security Best Practices

### Cloud Connector
- Deploy in DMZ under IT control
- Change default password immediately
- Configure LDAP for user management
- Enable audit logging (All level for production)
- Deploy high availability (master + shadow)

### Destinations
- Use OAuth over basic authentication
- Store credentials in Destination Service, not code
- Enable TLS for all connections
- Use mTLS for enhanced security

---

## Critical Rules

### Always Do
- Change Cloud Connector default password immediately
- Use HTTPS for all external connections
- Configure access control before exposing resources
- Enable audit logging in production
- Cache tokens and destinations appropriately

### Never Do
- Expose Cloud Connector UI to internet
- Store credentials in application code
- Skip access control configuration
- Modify Cloud Connector Tomcat config files
- Run multiple master instances (split-brain)

---

## Bundled Resources

### Configuration References
- `references/http-destinations.md` - Complete HTTP destination properties
- `references/rfc-destinations.md` - RFC destination properties and pooling
- `references/mail-tcp-ldap-destinations.md` - Mail, TCP, LDAP configuration
- `references/authentication-types.md` - All 17+ authentication configurations

### Setup & Configuration
- `references/cloud-connector.md` - Cloud Connector setup and configuration
- `references/kubernetes-connectivity.md` - Connectivity Proxy and Transparent Proxy
- `references/destination-service-api.md` - REST API reference

### Advanced Topics
- `references/advanced-configuration.md` - MTA, config.json, chaining, ZTIS
- `references/identity-propagation-scenarios.md` - ABAP, NetWeaver Java, custom IDP
- `references/operational-guides.md` - Network zones, solution management
- `references/connectivity-alternatives-and-config.md` - Reverse proxy, user roles, RFC config

### Development & SDK
- `references/java-sdk-development.md` - Java APIs, JCo, SAP Cloud SDK
- `references/mail-protocols.md` - SMTP, IMAP, POP3 configuration

### Templates
- `templates/destination-http-oauth.json` - HTTP destination with OAuth template
- `templates/destination-onpremise.json` - On-premise destination template
- `templates/connectivity-proxy-values.yaml` - Helm values for Connectivity Proxy
- `templates/transparent-proxy-values.yaml` - Helm values for Transparent Proxy

---

## Documentation Links

- **Official SAP Documentation**: [https://help.sap.com/docs/connectivity](https://help.sap.com/docs/connectivity)
- **GitHub Repository**: [https://github.com/SAP-docs/btp-connectivity](https://github.com/SAP-docs/btp-connectivity)
- **Destination API**: [https://api.sap.com/api/SAP_CP_CF_Connectivity_Destination](https://api.sap.com/api/SAP_CP_CF_Connectivity_Destination)
- **Release Notes**: [https://help.sap.com/whats-new/cf0cb2cb149647329b5d02aa96303f56](https://help.sap.com/whats-new/cf0cb2cb149647329b5d02aa96303f56)

---

**Last Updated**: 2025-11-27  
**Next Review**: 2026-02-27  
**Source**: [https://github.com/SAP-docs/btp-connectivity](https://github.com/SAP-docs/btp-connectivity) (383 files, 352+ analyzed)