Based on the search results, the VPN protocols most commonly supported by routers are:
- OpenVPN: This is one of the most widely supported VPN protocols for routers. It’s open-source, highly secure, and offers a good balance of speed and security .
- L2TP/IPsec: Many routers support this protocol combination. L2TP (Layer 2 Tunneling Protocol) is often paired with IPsec for encryption .
- PPTP (Point-to-Point Tunneling Protocol): While considered outdated and less secure, PPTP is still supported by many routers due to its simplicity and speed .
- IKEv2/IPsec: This protocol is becoming increasingly common on routers, especially for mobile connections, due to its ability to quickly re-establish connections .
- WireGuard: As a newer protocol, WireGuard support is growing among router manufacturers. It’s known for its simplicity, speed, and security .
It’s worth noting that not all routers support VPN functionality out of the box. Some may require firmware upgrades or custom firmware like DD-WRT or OpenWrt to enable VPN support . Additionally, the specific protocols supported can vary depending on the router model and manufacturer.When choosing a router for VPN use, it’s generally recommended to look for ones that support OpenVPN or WireGuard, as these protocols offer the best combination of security, performance, and compatibility .