SOLVED - Can't connect to CherryPy services I run several applications which I use port forwarding to expose so I can access them from outside of my home network. I run Air Video and Calibre, and a couple of python applications that use CherryPy as their embedded web server. After setting up a new RT-AC66U as my router, I found that port forwarding did not work for the CherryPy-based applications. Air Video and Calibre worked without any problems. After some more testing, I found that I can access the CherryPy apps from the PC they run on, by connecting to localhost or explicitly using the IP address. However, I was not able to connect using the (internal) IP address from a machine (inside my home network) other than the PC running the services. What's going on and how can I fix it?