How To Configure Openssh In Linux 7

SSH server is use for the parpose Remote Login between Linux to Linux and Linux to Unix Machine.

Service Profile :-

A. Packages

open ssh-server [server side]

open ssh-clients [client side]

B. Service

sshd

C. Configuration file

/etc/ssh/sshd_config

D. Port Number

22

 [SERVER SIDE]

#yum -y install openssh*

(install package)

#firewall-cmd --permanent --add-service=ssh

#firewall-cmd -reload

(allow in firewall)

#useradd raj (Create user)

#passwd raj (set password on raj user)

#useradd raj1 (Create user)

#passwd raj1 (set password on raj1 user)

  [CLIENT SIDE]

#ssh username@ip

example :- ssh raj@172.25.2.11

(Login with raj user)

#who

(you see who are remotely login with you)

 For Extra Security

[SERVER SIDE]

#vim /etc/hosts.allow

entry :-   sshd     :               172.25.2.0/24

(you give a permission for only 172.25.2.0/24 network connect with you and other not connect)

#vim /etc/hosts.deny

entry :-   sshd     :               ALL

(you give a permission for any network not connect with you but '172.25.2.0/24'  this network connect with you because you give this network permission in /etc/hosts.allow)

you also watch my video :-