> A hostname you have registered with Dynamic Network Services at DynDNS.org,
> tesuton.dyndns.tv, will expire in the next 5 days. This expiration is due
> to an automatic timeout; your host has not been updated for 30 days, and
> hosts are removed after not being updated for 35 days. This is our policy
> to prevent a stagnant DNS system.  Users with static IP addresses can use
> the Static DNS system, which does not have this timeout.
> You can "touch" your hostname and prevent it from being deleted simply by
> performing a manual, or forced, update.  The system will not consider this
> single update abusive. If you wish to allow your hostname to expire,
> simply do nothing.  You will receive a notification when this occurs.
> これれどーゆー意味(;´Д`)

IP更新しないと消しちゃうよ

参考：2004/02/13(金)12時20分43秒