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