its a hour, and if you have netgear, or whatever the other one sold in walmart besides linksys, you have a hour DNS refresh, just like me, it refreshes your DNS, and changes routers local ip, like mine changes randomly from 192.168.*.*, so my actual IP changes like 206.188.237.*, what you need to do is go in to your routers page, right on front page, should say "Auto DNS Refresh" you cant uncheck this, but right under it, it says "Change IP?" uncheck that, im running netgear