OpenWrt Supported Networking Protocols | Generated by AI
Question: What protocol does OpenWrt implement or have?
Answer:
OpenWrt is a Linux-based open-source firmware for embedded devices like routers. It does not implement a single specific protocol but supports a wide range of networking protocols through its core Linux kernel, configuration system (UCI/network config), and installable packages (via opkg).
Key categories of protocols supported:
- Basic IP and connection protocols (built-in or core):
- Static IP
- DHCP (client and server)
- DHCPv6
- PPPoE, PPPoA
- IPv4 and IPv6 (full dual-stack support, including VLANs)
- Tunneling and VPN protocols (via packages and protocol handlers in /etc/config/network):
- WireGuard (modern, high-performance VPN)
- OpenVPN
- L2TP (with xl2tpd package)
- PPTP (with ppp-mod-pptp package)
- GRE (with gre package)
- VXLAN
- IPsec (ESP, AH, ISAKMP via firewall rules)
- Cellular/modem protocols:
- QMI, MBIM, NCM, PPP (for 4G/LTE modems)
- Other networking features:
- UPnP, NAT-PMP, PCP (for port forwarding)
- Spanning Tree Protocol (STP)
- Relay (for pseudo-bridging)
OpenWrt’s extensibility allows adding more protocols via thousands of available packages. Many require installing specific packages (e.g., openvpn-openssl for OpenVPN).
References:
- https://openwrt.org/docs/guide-user/network/tunneling_interface_protocols
- https://en.wikipedia.org/wiki/OpenWrt
- https://sternumiot.com/iot-blog/openwrt-how-it-works-challenges-and-alternatives/
- https://teklager.se/en/knowledge-base/openwrt-4g-wwan-configuration/