SSH troubles

[Knapp]

To get into my computer from my own computer I need use sudo if I
dont' I get this (look down) and if I do I get in but it asked for my
password and I thought with public keys this would not happen. How do
I make this right??

douglas at frog:~$ ssh douglas at journeytothestars.webhop.net
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@       WARNING: POSSIBLE DNS SPOOFING DETECTED!          @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
The RSA host key for journeytothestars.webhop.net has changed,
and the key for the according IP address 91.51.118.15
is unknown. This could either mean that
DNS SPOOFING is happening or the IP address for the host
and its host key have changed at the same time.
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@    WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!     @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!
Someone could be eavesdropping on you right now (man-in-the-middle attack)!
It is also possible that the RSA host key has just been changed.
The fingerprint for the RSA key sent by the remote host is
a2:c1:1e:3c:b8:4a:a3:f8:bd:1d:8c:b6:00:ad:ea:d6.
Please contact your system administrator.
Add correct host key in /home/douglas/.ssh/known_hosts to get rid of
this message.
Offending key in /home/douglas/.ssh/known_hosts:4
RSA host key for journeytothestars.webhop.net has changed and you have
requested strict checking.
Host key verification failed.

douglas at frog:~$ sudo ssh douglas at journeytothestars.webhop.net
Ubuntu 8.04.1
douglas at journeytothestars.webhop.net's password:
. . . welcome all is good etc.. .


Also this happens, why??


douglas at frog:~$ ssh douglas at localhost
ssh_exchange_identification: Connection closed by remote host

Because I posted this I am closing port 22 so don't expect that to
work if you are testing something.
-- 
Douglas E Knapp

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