Putty error: Server unexpectedly closed network connection

[gboyce at badbelly.com (gboyce)]

On Thu, 16 Feb 2006, Bill Horne wrote:

> Vijairaj wrote:
>
>> On 2/16/06, Bill Horne <bill at horne.net> wrote:
>> 
>>> I'm getting an error when attempting to access my home server with ssh:
>>> 
>>> "Server unexpectedly closed network connection"
>>> 
>> 
>> You can try this to get a verbose output
>> putty.exe -v -ssh user at host
>> 
>>
>> 
> Thanks for the suggestion: it produces a "Connecting to <ip address> port 
> 22", and then the next line has the same error message.

What do you get if you telnet to port 22?  Do you get an SSHD banner 
string, or does the connection close immediatly?