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supercalifragilisticexpialidocious

Aix-security

some security configuration for AIX ssh and system services

create a user group named rmt_acc, only allow this group user access ssh, don’t allow root login and use public key authentication.

sshd_config content

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# $OpenBSD: sshd_config,v 1.77 2008/02/08 23:24:07 djm Exp $


# This is the sshd server system-wide configuration file. See
# sshd_config(5) for more information.


# This sshd was compiled with PATH=/usr/bin:/bin:/usr/sbin:/sbin


# The strategy used for options in the default sshd_config shipped with
# OpenSSH is to specify options with their default value where
# possible, but leave them commented. Uncommented options change a
# default value.


#Port 22
#AddressFamily any
#ListenAddress 0.0.0.0
#ListenAddress ::


# Disable legacy (protocol version 1) support in the server for new
# installations. In future the default will change to require explicit
# activation of protocol 1
Protocol 2


# HostKey for protocol version 1
#HostKey /etc/ssh/ssh_host_key
# HostKeys for protocol version 2
#HostKey /etc/ssh/ssh_host_rsa_key
#HostKey /etc/ssh/ssh_host_dsa_key


# Lifetime and size of ephemeral version 1 server key
#KeyRegenerationInterval 1h
#ServerKeyBits 768


# Logging
# obsoletes QuietMode and FascistLogging
#SyslogFacility AUTH
#LogLevel INFO


# Authentication:


#LoginGraceTime 2m
PermitRootLogin no
StrictModes yes
#MaxAuthTries 6


#RSAAuthentication yes
PubkeyAuthentication yes
#AuthorizedKeysFile .ssh/authorized_keys


# For this to work you will also need host keys in /etc/ssh/ssh_known_hosts
#RhostsRSAAuthentication no
# similar for protocol version 2
#HostbasedAuthentication no
# Change to yes if you don't trust ~/.ssh/known_hosts for
# RhostsRSAAuthentication and HostbasedAuthentication
#IgnoreUserKnownHosts no
# Don't read the user's ~/.rhosts and ~/.shosts files
#IgnoreRhosts yes


# To disable tunneled clear text passwords, change to no here!
PasswordAuthentication no
PermitEmptyPasswords no


# Change to no to disable s/key passwords
ChallengeResponseAuthentication no


# Kerberos options
#KerberosAuthentication no
#KerberosOrLocalPasswd yes
#KerberosTicketCleanup yes
#KerberosGetAFSToken no


# GSSAPI options
#GSSAPIAuthentication no
#GSSAPICleanupCredentials yes


# Set this to 'yes' to enable PAM authentication, account processing,
# and session processing. If this is enabled, PAM authentication will
# be allowed through the ChallengeResponseAuthentication and
# PasswordAuthentication. Depending on your PAM configuration,
# PAM authentication via ChallengeResponseAuthentication may bypass
# the setting of "PermitRootLogin without-password".
# If you just want the PAM account and session checks to run without
# PAM authentication, then enable this but set PasswordAuthentication
# and ChallengeResponseAuthentication to 'no'.
UsePAM yes


#AllowTcpForwarding yes
#GatewayPorts no
#X11Forwarding no
#X11DisplayOffset 10
#X11UseLocalhost yes
#PrintMotd yes
#PrintLastLog yes
#TCPKeepAlive yes
#UseLogin no
UsePrivilegeSeparation yes
#PermitUserEnvironment no
#Compression delayed
ClientAliveInterval 600
ClientAliveCountMax 0
#UseDNS yes
#PidFile /var/run/sshd.pid
#MaxStartups 10
PermitTunnel no
#ChrootDirectory none


# no default banner path
#Banner none


# override default of no subsystems
Subsystem sftp /usr/sbin/sftp-server


# Example of overriding settings on a per-user basis
#Match User anoncvs
# X11Forwarding no
# AllowTcpForwarding no
# ForceCommand cvs server


AllowGroups rmt_acc

install sudo for AIX

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rpm -i sudo-for-aix.rpm

stop telnet/login/ftp/shell/exec service:

don’t start telnet if reboot:

comment the line starts with ‘telnet’/‘login’/‘ftp’/‘shell’/‘exec’ in /etc/inetd.conf

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stopsrc -t telnet

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