I previously had a VPN server set up at home with ports forwarded through my router which I last used in October. I have discovered that I am unable to access it.
Today, further investigation is that I can't even ping my router, I can ping the gateway to which it is attached (79.69.64.1)
I temporarily replaced my router with an openreach modem and other router which I was able to ping from my phones 4G connection. This combo was issued an ip address in a different subnet from that which the router is usually connected to.
I've done a factory reset on the router, same result.
Does anybody have any ideas?