DokuWiki » Infrastructure » Operating System » CentOS 7

h1. Configure ssh-server on a host

h2. Requirements

To configure ssh you will need the following:

* a installed and supported operating system (e.g. CentOS 7.x)

* root-access

* a fast internet connection

h2. 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

h2. Install ssh

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

<pre><code class="bash">

yum install openssh-server

</code></pre>

h2. Configure ssh

<pre><code class="bash">

vim /etc/ssh/sshd_config

</code></pre>

<pre>

# Prevent root logins:

PermitRootLogin no

AllowUsers alice bob

PubkeyAuthentication yes

PasswordAuthentication no

</pre>

after doing some changes you will have to restart the service

<pre><code class="bash">

systemctl restart sshd.service

</code></pre>

h2. ssh-service

<pre><code class="bash">

systemctl enable sshd.service

systemctl is-enabled sshd.service 

</code></pre>

should result in

<pre><code class="bash">

enabled

</code></pre>