Can't ssh into iPhone

I used to be able to do this a while ago, but now, for some reason I can't. I have installed and later reinstalled OpenSSH on my iPhone.

ssh root@10.0.1.16

Returns that the connection to 10.0.1.16 on port 22 timed out, doing this with root access returns this:

ssh: connect to host 10.0.1.16 port 22: Host is down

So what can I do? This used to work.