You could remote into a PC on that LAN but I take it that was not setup and you want to make a change from 250 KM but I have to write no. To make such changes we have to plan ahead or have someone there to do the work for us.
It looks to me you have one more trip to set this up.
I have setup a ip-cam at my summer-place and everything was working perfect! Until i setup a computer with noip-update. now when I try to access the cam through my noip-adress it points to the computer. the case is that I have port:80 on the cam and probably the computer. Is there a way to connect to a "inside" dhcp ip through my noip-adress? example: "http://noip-adress.com/xxx.cam.ip.xx:80" ? so I can change the port on my cam to something better without driving 250 kilometers.. xD
I have another ip-cam at the place with a different port that works well!
Thanx in advance!