added tuto server

config_files/.screenrc

@@ -49,6 +49,7 @@ screen -t tutos_screen		vim -n	./tutos/screen.txt
 screen -t tutos_git				vim -n	./tutos/git.txt
 screen -t tutos_sites			vim -n	./tutos/sites.txt
 screen -t tutos_computer	vim -n	./tutos/computer.txt
+screen -t tutos_server  	vim -n	./tutos/server.md
 
 chdir $HOME
 screen

tutos/server.md

@@ -0,0 +1,111 @@
+
+## how to secure a proxmox server :
+
+---
+
+### 1. Update and Patch Regularly
+	Ensure that both Debian and Proxmox are always up to date with the latest security patches and updates.
+	```sh
+	apt update && apt upgrade -y
+	```
+	Consider setting up unattended upgrades for security patches.
+
+### 2. Secure SSH Access
+	- **Change the default SSH port** from 22 to a less common port to reduce exposure to automated attacks.
+	```sh
+	sudo nano /etc/ssh/sshd_config
+	```
+	Change the `Port` setting and restart the SSH service.
+	- **Disable root login** via SSH.
+	```sh
+	PermitRootLogin no
+	```
+	- **Use SSH keys** for authentication instead of passwords.
+	```sh
+	# Generate a key pair on your local machine
+	ssh-keygen
+
+	# Copy the public key to the server
+	ssh-copy-id user@server_ip
+	```
+	- **Use Fail2Ban** to prevent brute-force attacks.
+	```sh
+	apt install fail2ban
+	```
+	Configure Fail2Ban to monitor SSH login attempts.
+
+### 3. Set Up a Firewall
+	Use `iptables` or `ufw` to configure a firewall.
+	- **Install and configure UFW**:
+	```sh
+	apt install ufw
+	ufw default deny incoming
+	ufw default allow outgoing
+	ufw allow ssh
+	ufw allow 8006/tcp  # Proxmox web interface
+	ufw enable
+	```
+
+### 4. Secure the Proxmox Web Interface
+	- **Use HTTPS**: Ensure that the Proxmox web interface uses HTTPS. Proxmox generates a self-signed certificate by default, but you can replace it with a certificate from a trusted CA.
+	```sh
+	apt install certbot
+	certbot certonly --standalone -d your_domain
+	```
+	- **Restrict access** to the web interface to specific IP addresses.
+	```sh
+	ufw allow from your_ip to any port 8006
+	```
+
+### 5. Enable Two-Factor Authentication (2FA)
+	- Log in to the Proxmox web interface.
+	- Navigate to `Datacenter -> Permissions -> Realms`.
+	- Edit your realm (usually `pam`) and enable Two-Factor Authentication.
+
+### 6. Monitor and Log
+	- **Install monitoring tools** like `Zabbix`, `Prometheus`, or `Nagios`.
+	- **Configure logging** and log monitoring.
+	```sh
+	apt install rsyslog
+	```
+	Ensure rsyslog is properly configured to log system events and monitor these logs for suspicious activity.
+
+### 7. Limit User Privileges
+	- Create user accounts with the minimum necessary privileges.
+	- Use Proxmox’s role-based access control (RBAC) to manage user permissions.
+
+### 8. Disable Unnecessary Services
+	- Identify and disable any unnecessary services to reduce the attack surface.
+	```sh
+	systemctl list-unit-files | grep enabled
+	systemctl disable <service_name>
+	```
+
+### 9. Regular Backups
+	- Regularly back up your Proxmox configuration and VMs.
+	- Ensure backups are stored securely and can be restored quickly in case of an incident.
+
+### 10. Intrusion Detection System (IDS)
+	- Install and configure an IDS like `Snort` or `OSSEC`.
+	```sh
+	apt install snort
+	```
+	Configure Snort to monitor network traffic for suspicious activities.
+
+### 11. Secure NTP Configuration
+	- Ensure accurate timekeeping with NTP or chrony, but secure it to prevent exploitation.
+	```sh
+	apt install ntp
+	```
+	Edit the configuration to restrict access.
+
+### 12. Physical Security
+	- Ensure the physical security of your server hardware.
+	- Use BIOS/UEFI passwords and ensure only authorized personnel have access.
+
+### 13. Disable IPv6 (if not needed)
+	- If your network does not use IPv6, disable it to reduce the attack surface.
+	```sh
+	echo "net.ipv6.conf.all.disable_ipv6 = 1" >> /etc/sysctl.conf
+	sysctl -p
+	```