The settings here are relatively straightforward with few options. Let’s just cover the differences between each mode and type.
Operating modes include:
Redir-Host (Compatibility) Mode: Offers best compatibility but weak UDP support, potentially causing some game videos to fail.
Redir-Host (TUN) Mode: Captures both UDP/TCP traffic with full control; some older firmware versions do not support TUN.
Redir-Host (TUN-Hybrid) Mode [UDP-TUN, TCP-Forwarding]: Full UDP support; TCP uses traditional methods. More complex logic with slightly higher performance requirements.
I used TUN mode.
The other setting is Network Type:
OpenClash captures and routes traffic by relying on the operating system’s kernel network stack or the built-in gVisor network stack.
Network stack = Core component managing system network protocols (TCP/UDP/IP)
OpenClash offers three capture/forwarding methods, altering how the kernel processes traffic
Selecting different network stacks impacts: UDP/TCP processing capability, compatibility, system resource usage
System: The operating system’s default network stack supports both TCP and UDP, though UDP may face partial restrictions from NAT/firewalls. Offers best compatibility but slightly lower performance in complex UDP/TUN scenarios.
gVisor: Fully supports TCP/UDP, including TUN capture. Provides optimal UDP/TCP compatibility and bypasses system network restrictions, though it consumes slightly more CPU and memory.
Mixed: TCP uses System stack, UDP uses gVisor stack. Balances compatibility with full UDP capture. More complex logic, slightly higher CPU resource usage.
I selected Mixed.
Other:
Proxy Mode: Rule [Policy Proxy]
Delayed Start: 5. Increase if your hardware boots slowly. Otherwise, 0 is perfectly fine.
Log Size: 1024. Adjust based on logging needs. I set it to 1MB for occasional review.
Bypass Gateway (Bypass Routing) Compatibility: Unchecked. Should be checked if used as a bypass router; I haven’t used this feature.
Disable quic-go GSO Support: Unchecked. Only check if UDP QUIC compatibility issues arise.
Small Flash Mode: Unchecked. My memory is sufficient; this isn’t needed.
The above information is current as of February 2026. I will update it if new information becomes available later.