I already have got this proplem but i already dont find asolution neither contact my network company to get static ip but if u want here is a great idea "but will not make ur ip static" follow this steps 1st make an autopatch --->
Then after u done with it use this tool
after u makes ur no ip host from
put in in the autopatcher and the DynDns tool this will helps u so when ur ip changes and after u change it in ur configs , shell ect.. players when they connect with the autopatch theri ip's in the oem will changes to ur new ip this idea is just to help for some proplems but in sure not for static ip it just for not releasing 2 or 3 patches per day also restarting server and more !!