Got the bugger ..... it's now getting it's internal IP 55.120 and no longer pulling its default 192.168.1.4.
Now problem 2 - even if I put the puppy in my DMZ on the Asus router you can't see it at all from outside.
It works briefly and you can see it from a phone or remote PC but then it disappears ....
I've pulled it back inside and created a rule in the router for it's address and port 80 but is that the right port?
I don't mind opening up the whole thing temporally if it'll help, any suggestions?