Putty Error – Server Unexpectedly Closed Network Connection

Many reasons to show the error “server unexpectedly closed network
connection”. Please check the following things.

1. Are you able to ping the server from client PC?
2. How many attempts have you tried? Some cases system block the user
attempting more then three attempts or whatever settings you
mentioned in configuration file.
3. Is there any firewall settings who block your IP?


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