Hello, ive just bought a Plusnet Hub One, which is flashed with openWRT, i have a sky router. I want to use the plusnet router as an openvpn router. I connected it via the WAN port with ethernet cable to one of the LAN ports on the sky router. I do have uPNP disabled on the sky router, It is for a reason. In the status overview on the plusnet it sees the sky routers gateway which is 192.168.0.1. The plusnets is 192.168.1.1. Do i need to change the ip4 address for the plusnet to be on the same prefix as the sky router eg 192.168.0.2 ? I did try but it didnt apply the changes and it crashed the internet on the sky router, so im a bit stuck now. Obviousely i cant download any sofware packages for openvpn until i get a connection
In answer to your question, as the sky hub is on default 192.168.0.1, you can leave the LAN IP address of the HH5a unchanged at 192.168.1.1 if you follow above guide.
(re. your image. You have set the wrong WAN side static IP address btw)
fwiw, if you are a Windows user, refer also to section 10 of the 200 page installation guide if you wish to learn about PuTTY and WinSCP software for Windows.
Im very familiar with putty and ssh i have 2 vps servers running apache 2 so thats not an issue. I tried to set this up without reading anything so my own fault.