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FRP Port Mapping

Frp NAT Traversal

What is Frp?

Frp is a high-performance reverse proxy application focused on NAT traversal. It supports:

  • Multiple protocols: TCP, UDP, HTTP, HTTPS, etc.
  • Secure exposure of intranet services
  • Either self-hosted servers or third-party providers

Installation and Configuration

  1. Install the Frpc client on One-KVM: 

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    wget https://raw.githubusercontent.com/stilleshan/frpc/master/frpc_linux_install.sh && chmod +x frpc_linux_install.sh && ./frpc_linux_install.sh

  2. Obtain Frp configuration

    • If using a third-party provider (e.g., OpenFrp), create a tunnel and obtain the configuration
    • If self-hosting, deploy the Frps server first and prepare the configuration

    Example of creating a TCP tunnel in OpenFrp: Create tunnel

    Tunnel config

  3. Modify the Frpc configuration file: 

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    # Edit config
nano /usr/local/frp/frpc.toml

# Restart service to apply changes
sudo systemctl restart frpc

# Check service status
sudo systemctl status frpc

Frpc config example

Remote Access

Access via HTTPS

When accessing the One-KVM web UI, you must use the https:// scheme, for example: 

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https://your-domain:port
Using http:// will result in a "400 Bad Request" error.

HTTPS Access Hint

Security recommendations

  • Use strong passwords for your Frp services
  • Enable One-KVM Two-Factor Authentication
  • Review and update Frp configuration regularly