# Package generated configuration file
# See the sshd(8) manpage for defails
 
# What ports, IPs and protocols we listen for
Port 22
# Use these options to restrict which interfaces/protocols sshd will bind to
#ListenAddress ::
ListenAddress 0.0.0.0
Protocol 2
# HostKeys for protocol version 2
HostKey /etc/ssh/ssh_host_rsa_key
HostKey /etc/ssh/ssh_host_dsa_key
#Privilege Separation is turned on for security
UsePrivilegeSeparation yes
 
# ...but breaks Pam auth via kbdint, so we have to turn it off
# Use PAM authentication via keyboard-interactive so PAM modules can
# properly interface with the user (off due to PrivSep)
PAMAuthenticationViaKbdInt no
# Lifetime and size of ephemeral version 1 server key
KeyRegenerationInterval 3600
ServerKeyBits 768
 
# Logging
SyslogFacility AUTH
LogLevel INFO
 
# Authentication:
LoginGraceTime 600
PermitRootLogin yes
StrictModes yes
 
RSAAuthentication yes
PubkeyAuthentication yes
#AuthorizedKeysFile %h/.ssh/authorized_keys
 
# rhosts authentication should not be used
RhostsAuthentication no
# Don't read the user's ~/.rhosts and ~/.shosts files
IgnoreRhosts yes
# For this to work you will also need host keys in /etc/ssh_known_hosts
RhostsRSAAuthentication no
# similar for protocol version 2
HostbasedAuthentication no
# Uncomment if you don't trust ~/.ssh/known_hosts for RhostsRSAAuthentication
#IgnoreUserKnownHosts yes
 
# To enable empty passwords, change to yes (NOT RECOMMENDED)
PermitEmptyPasswords no
 
# Uncomment to disable s/key passwords  
#ChallengeResponseAuthentication no
 
# To disable tunneled clear text passwords, change to no here!
PasswordAuthentication yes
 
 
# To change Kerberos options
#KerberosAuthentication no
#KerberosOrLocalPasswd yes
#AFSTokenPassing no
#KerberosTicketCleanup no
 
# Kerberos TGT Passing does only work with the AFS kaserver
#KerberosTgtPassing yes
 
X11Forwarding no
X11DisplayOffset 10
PrintMotd no
#PrintLastLog no
KeepAlive yes
#UseLogin no
 
#MaxStartups 10:30:60
#Banner /etc/issue.net
#ReverseMappingCheck yes
 
Subsystem sftp /usr/lib/sftp-server
 

ssh_exchange_identification: Connection closed by remote host

iptables -F
iptables -X
iptables -P INPUT ACCEPT
iptables -P OUTPUT ACCEPT
iptables -P FORWARD ACCEPT

Description: Portscan detection daemon
 PortSentry has the ability to detect portscans(including stealth scans) on
 the network interfaces of your machine. Upon alarm it can block the attacker
 via hosts.deny, dropped route or firewall rule. It is part of the Abacus
 program suite.