Remotely Connect to SAP system from Home

Dear Experts

I need to configure our sap system to access from the out side though SAP router.

The connection I just need over the SAP router. Not though VPN and Static IP. 

I supposed to have the connection with one sap router or 2 sap routers.

Second method with 2 sap routers.

I have already configure a static public IP to the SAP system can access over the internet via the public IP.

My saprouttab configuration as follows.

regards

Priyan