Using tunneled connections greatly improves security for devices with interfaces directly on the Internet. The ports being used are not visible on any external interfaces. These are connections that go through the SSH connection and appear to come from the inside of the Raspberry Pi and the client computer.

By trying to connect as shown in the following step we can determine that 192.168.5.73 is the device we want. Note in the image that we have devices at 192.168.5.73 and 192.168.5.101 that have port 22 open (Note is it easier to look for 'closed: 0'). One can also open a command window and use the 'ipconfig' command. This will show the assigned IP address and the subnet mask. Then we can click 'Status' and then the 'Details.' button. In Windows we can go to the network connections and right mouse click on the connection to the subnet (Ethernet or wireless). If we are not sure of the subnet, there are several ways to find out what it is. I use Advanced Port ScannerĪs shown in the image, we can set it to scan port 22 at all the addresses in the subnet. A simple way to find the address is with a port scanner.

We can't always access the DHCP server and even if we can, it can be complicated. If we have access to the DHCP server, we can look at the lease table to find the assigned address. There are a number of ways to discover the Raspberry Pi's address.

To get connected with Putty one needs to know the IP address and port number of the Raspberry Pi.

Adguard raspberry pi 4