$ ssh firstname.lastname@example.org -vvv OpenSSH_5.3p1 Debian-xduh, OpenSSL 0.9.8k 25 Mar 2010 debug1: Reading configuration data /etc/ssh/ssh_config debug1: Applying options for * debug2: ssh_connect: needpriv 0 debug1: Connecting to 10.3.57.3 [10.3.57.3] port 22. debug1: Connection established. debug1: identity file /home/from/.ssh/identity type -1 debug1: identity file /home/from/.ssh/id_rsa type -1 debug1: identity file /home/from/.ssh/id_dsa type -1 ssh_exchange_identification: Connection closed by remote host
In the SSH Server.
# /etc/init.d/fail2ban stop # /etc/init.d/portsentry stop
To allow connections to the SSH daemon from all hosts allways
# echo "sshd: ALL" >> /etc/hosts.allow
ssh_exchange_identification hosts.allow Debian