I got the problem that gargoyle fw (1.8.1) and they all shows me different wan ip than I got.
It shows 100.x.x.x instead of the real ip.
This comes one day to another I wasn't at my home I didn't do anything. Release/renew commands don't solve the problem.
I am sad.
I have got only the router connected to another isp device I haven't got modem. Router reset didn't help

TpLink WR1043 v2 router I got.
Thanks for the help.
This firmware worked for me for a year without major problems. But now this is annoying..