我们当前的ECC连接器是基于OData构建的.对于您的问题:

our current ECC connector is built based on OData. for your questions:

1)如果可以通过Internet访问ECC的端点.则无需使用自托管的IR，尽管对于SAP数据，建议使用自托管的IR，这样您只需要将SAP的odata端点授予自托管的IR计算机 大部分都在您自己的网络中，而不是通过公共Internet访问.

1) if the endpoint of your ECC can be accessed via internet. then there is no need to use self-hosted IR although for SAP data, it is recommended to use self-hosted IR so that you only need to grant odata endpoint of your SAP to the self-hosted IR machine which mostly is in your own network rather than public internet access.

一旦安装了自托管的IR，您可以尝试从ADF门户进行测试，以选择配置为可以访问ECC的自托管的IR连接到ECC

Once you have the self-hosted IR installed, you can try to test from ADF portal to connect to your ECC with the self-hosted IR chosen as the one you configured which can access your ECC

2)OData通过HTTP，因此您需要在自托管的IR机器和SAP网关之间打开相对端口.

2) OData goes through HTTP(s), so you will need to get the relative port opened between the self-hosted IR machine and your SAP gateway. 

3)自托管的IR机器需要具有外部网络访问权限，以便ADF服务可以与其进行通信以进行控制管理.

3) the self-hosted IR machine needs to have external network access so that ADF service can communicate with it for control management. 

希望这会有所帮助.

Hope this helps.