WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!

2013 will pass and I want to learn new operating system and use this blog as place of documentation of my learning. OpenBSD is my choose and perhaps NetBSD too. How to get it up and many more. Today I’ve install OpenBSD using VirtualBox under Ubuntu Linux 13.04. Error message came out when I try to ssh newly install OpenBSD box :

$ ssh alam@192.168.1.207

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@    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 a host key has just been changed.
The fingerprint for the ECDSA key sent by the remote host is
ba:4b:ee:4c:b1:6d:02:41:62:e0:19:1e:c5:11:e7:0b.
Please contact your system administrator.
Add correct host key in /home/alamsyah/.ssh/known_hosts to get rid of this message.
Offending ECDSA key in /home/alamsyah/.ssh/known_hosts:19
remove with: ssh-keygen -f “/home/alamsyah/.ssh/known_hosts” -R 192.168.1.207
ECDSA host key for 192.168.1.207 has changed and you have requested strict checking.
Host key verification failed.

Get rid of that message :

$ ssh-keygen -f "/home/alamsyah/.ssh/known_hosts" -R 192.168.1.207

/home/alamsyah/.ssh/known_hosts updated.
Original contents retained as /home/alamsyah/.ssh/known_hosts.old
alamsyah@alamsyah-Aspire-E1-471:~$ ssh alam@192.168.1.207
The authenticity of host ’192.168.1.207 (192.168.1.207)’ can’t be established.
ECDSA key fingerprint is ba:4b:ee:4c:b1:6d:02:41:62:e0:19:1e:c5:11:e7:0b.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added ’192.168.1.207′ (ECDSA) to the list of known hosts.
alam@192.168.1.207′s password:
Last login: Fri Dec 20 20:43:20 2013
OpenBSD 5.4 (GENERIC) #37: Tue Jul 30 12:05:01 MDT 2013

Welcome to OpenBSD: The proactively secure Unix-like operating system.

Please use the sendbug(1) utility to report bugs in the system.
Before reporting a bug, please try to reproduce it with the latest
version of the code.  With bug reports, please try to ensure that
enough information to reproduce the problem is enclosed, and if a
known fix for it exists, include that as well.

$

Good call.

Lesson learned, I used to use same IP for experiment and this message came out. In future I’ll use different ip for different operating system.