what does this mean ?

[vu pham]

I was on my home PC "gh" making connection to the server "o" in the
office and got the error and the next immediate trying has it worked.

Never has I got this before.


[vu at gh ~]$ ssh o
ssh_exchange_identification: read: Connection reset by peer
[vu at gh ~]$ ssh o
The authenticity of host 'o (192.168.249.214)' can't be established.
RSA key fingerprint is 99:a7:af:cc:8a:1b:86:ec:77:20:a6:91:f0:6f:30:73.
Are you sure you want to continue connecting (yes/no)? 

Vu