Configure ssh-server on a host¶

Requirements¶

To configure ssh you will need the following:

• a installed and supported operating system (e.g. CentOS 6.x)
• root-access
• a fast internet connection

Preliminary Note¶

Some basic information may be found at

• http://www.centos.org/docs/5/html/Deployment_Guide-en-US/s1-openssh-server-config.html
• http://wiki.centos.org/HowTos/Network/SecuringSSH

Install ssh¶

usually ssh is installed by default and the service is started up automatically

yum install openssh-server

Configure ssh¶

vim /etc/ssh/sshd_config

# Prevent root logins:
PermitRootLogin no

AllowUsers alice bob

PubkeyAuthentication yes
PasswordAuthentication no

after doing some changes you will have to restart the service

service sshd restart

ssh-service¶

chkconfig --list sshd

should result in

sshd               0:off    1:off    2:on    3:on    4:on    5:on    6:off