Born2beroot

For this project I used Debian with VM virtualbox I have to configure SSH service with specifics configurations

SSH

To install SSH

sudo apt install openssh-server

To check STATUS, START or STOP the service it needs to be run:

sudo systemctl status/start/stop ssh

To modify the port and the root login of the protocol just edit this file and its lines

/etc/ssh/sshd_config
  Port 4242
  PermitRootLogin no

UFW

sudo apt install ufw

sudo ufw enable

sudo ufw allow 4242

To delete a rule, check the status numbered and delete the ones you want

sudo ufw status numbered

sudo ufw delete Number

PASSWORD

Edit this file to change the expiration of the password, the minimun days til change and days for warnning

/etc/login.defs

PASS_MAX_DAYS Number
PASS_MIN_DAYS Number
PASS_WARN_AGE Number

To maintain the strenght of the user's password.

sudo apt install libpam-pwquality

/etc/pam.d/common-password
  password requisite pam_cracklib.so retry=3 minlen=10 ucredit=-1 dcredit=-1 maxrepeat=3 reject_username enforce_for_root difok=7

CRONTAB

Executes monitoring.sh

sudo crontab -u root -e
*/min * * * * bash file.sh

My final score: