Have the same problem, but I installed Oxwall manually. Can't believe that oxwall actually hard codes the location of the oxwall installation in several php and html files. I was able to change my IP back, and there might be better solutions, but if not, you might want to do it manually. The following approach might work. in a terminal window, visit your oxwall install web-root. search for the IP or hard-coded location (e.g.: grep -R 10.0.0.15 *). Then change all these occurrences. You might want to test if it works. If not, I guess it also embeds the location in the database. Log in into the database, search for the same pattern (using SQL for instance) and alter these as well. Then it should work.
In any case, when someone opens oxwall admin page and the configured location is not correct, it should (immediately) show an admin login and maintenance option to alter the location.oxwall should need to do the update of configuration. How can oxwall ever be considered into a decent DTAP-structure if we cannot just copy the site to a different base location?