Generate Certificate for Proxmox.

# SSH into your Proxmox server
ssh root@172.17.1.10

# Navigate to the certificates directory
cd /etc/pve/nodes/$(hostname)/

# Generate a new private key
openssl genrsa -out proxmox-custom.key 2048

# Create a certificate signing request
openssl req -new -key proxmox-custom.key -out proxmox-custom.csr \
  -subj "/C=US/ST=State/L=City/O=Organization/CN=pve1.mydomain.com"

# Create a self-signed certificate (valid for 365 days)
openssl x509 -req -in proxmox-custom.csr -signkey proxmox-custom.key \
  -out proxmox-custom.crt -days 365

# Combine certificate and any intermediate certificates
cat proxmox-custom.crt > pveproxy-ssl.pem

# Copy the private key
cp proxmox-custom.key pveproxy-ssl.key

# Set proper permissions
chmod 600 pveproxy-ssl.key

# Restart the Proxmox web service
systemctl restart pveproxy