Initial setup of CentOS 7 server.
First role (sudo_user)
- System update
- Check if reboot is required
- Create sudo admin, add ssh public key and set no password in sudoers file
Second role (bootstrap)
- Set timezone
- Install, setup chrony utility and synchronize time and date against remote ntp server
- Install tcpdump
- Setup firewall rule for SSH custom port
- SSH hardening (custom port, disable IPv6 port, disable root login, disable password login and disable no password login)
2.9.6 (September 2020)
CentOS 7 server (ver. 7.8)
a) Cloud Platform account
b) A VPS server with CentOS 7.8 already installed
c) An SSH key pair
a) On your laptop create a working directory
b) In your working directory open a console window
c) Clone github repository
git clone https://github.com/jobetinfosec/ansible-centos7-bootstrap.git
d) Switch to first role directory
cd ansible-centos7-bootstrap/sudo_user
e) Open the hosts file
nano hosts
f) Replace <TEMPORARY_ITEMS> with your own data:
<SERVER_IP> replace <SERVER_IP> with the actual IP address of your remote server
<PRIVATE_KEY_NAME> replace it with your private key's name
then save and close the file
g) Open the defaults main.yml file
nano roles/basic/defaults/main.yml
h) Replace <TEMPORARY_ITEMS> with your own data:
<USER_NAME> replace <USER_NAME> with the name of sudo user
<PASSWORD_HASH> replace it with the hash of sudo user's password (to create a password hash use mkpasswd --method=sha-512 command. If mkpasswd is not installed, install it with apt-get install whois)
<PUBLIC_KEY_NAME> replace it with your public key's name
then save and close the file
i) Check if you are able to ping remote server
ansible -m ping all
You should receive a SUCCESS message
j) Check if any error shows up
ansible-playbook sudo_user.yml --check
k) Launch installation
ansible-playbook sudo_user.yml
l) Switch to second role directory
cd ansible-centos7-bootstrap/bootstrap
m) Open the hosts file
nano hosts
n) Replace <TEMPORARY_ITEMS> with your own data:
<SERVER_IP> replace <SERVER_IP> with the actual IP address of your remote server
<USER_NAME> replace it with sudo user name
<SUDO_USER_PASSWORD> replace it with sudo user password
then save and close the file
o) Open the defaults main.yml file
nano roles/basic/defaults/main.yml
p) Replace <TEMPORARY_ITEMS> with your own data:
<USER_NAME> replace <USER_NAME> with the name of sudo user
<PASSWORD_HASH> replace it with the hash of sudo user's password (already created during first role "sudo_user")
<PUBLIC_KEY_NAME> replace it with your public key's name
<CUSTOM_SSH_PORT> replace it with your custom ssh port
then save and close the file
q) Check if you are able to ping remote server with sudo user's name
ansible -u <SUDO_USER_NAME> -m ping all
You should receive a SUCCESS message
r) Check if any error shows up
ansible-playbook centos_bootstrap.yml --check
s) Launch installation
ansible-playbook centos_bootstrap.yml
MIT licence
Created by Roberto Jobet ([email protected]).
Don't hesitate to open an Issue if you find any bug or have suggestions.