I have cisco 837 Router with ADSL connection with fixed Public IP and one LAN IP 192.168.1.1. The LAN interface is connected to a LAN Switch where an application server 192.168.1.2 is also connected.
Is it possible to forward the telnet traffic hitting the public ip of the ADSL Router to private IP 192.168.1.2 automatically without asking the users any user name and password for telnet?
I need to allow this only traffic coming for one public ip and not the whole internet.
Example: A user having the public ip telnets to the public ip of the ADSL Router. The Router should see if the traffic is coming from the allowed public IP and then automatically forward that traffic to 192.168.1.2.