Re: ssh errors from cron jobs

Russell Coker <russell@coker.com.au> writes:

Error1: ssh_exchange_identification: Connection closed by remote host

Error2: ssh_exchange_identification: Connection closed by remote host rsync: connection unexpectedly closed (0 bytes received so far) [Receiver] rsync error: unexplained error (code 255) at io.c(605) [Receiver=3.0.9]

These appear to be client-side errors. By design, SSHv2 does not disclose much error information to the client. Check the SERVER-side log (e.g. /var/log/auth.log or /var/log/secure). I agree with the other posters that rate limiting is a likely candidate.