Advanced VPN controls
Build more deliberate VPN client and server workflows with router-level routing options, while remembering that real throughput still depends on the router CPU and encryption method.
Advanced router firmware guide
More control with Asus Merlin.
Review Asus Merlin firmware, compatibility, setup, advanced features, SQM and ad-blocking workflows, common troubleshooting steps, and the correct download path in one lightweight guide.
Exact-model checks
Backup-first setup
Practical router guides
Router-focused workflow
Lightweight static site
What is Asus Merlin?
Familiar ASUSWRT foundations with deeper network control.
Asus Merlin is enhanced firmware for supported ASUS routers. It keeps the familiar ASUSWRT experience while adding practical administration refinements, scripting support, VPN controls, DNS flexibility and other features valued by advanced home-network users.
The safest approach is always model-first: confirm the exact router, keep a backup, understand the recovery path, and only use firmware intended for that hardware.
Advanced administration
VPN and DNS controls
Script-friendly workflows
Model-specific firmware
Asus-Merlin features
Useful controls without turning the router into a complicated dashboard.
The feature set varies by model and firmware branch, but these are the areas users most often explore.
DNS flexibility
Use expanded DNS and privacy-oriented settings as part of a more controlled local network configuration.
Custom scripts
Supported scripting hooks make it possible to automate selected router tasks and integrate established add-on workflows.
Network monitoring
Review useful system information and network activity from the familiar router administration environment.
SQM and queue planning
Consider queue-management options carefully when balancing latency, bufferbloat and hardware acceleration.
Ad-blocking workflows
DNS and script capabilities can support network-level filtering through compatible services or community add-ons.
How it works
A simple model-first firmware workflow.
Keep the process controlled and reversible instead of treating firmware changes like a routine app update.
1
Identify the router
Confirm the exact model and hardware family before choosing any firmware.
2
Back up settings
Save the current configuration and separately record critical WAN, Wi-Fi and VPN details.
3
Install carefully
Use the router firmware page, stable power and preferably a wired connection during the upgrade.
4
Verify services
After reboot, test WAN access, Wi-Fi, DNS, VPN and any custom services you rely on.
Compatibility
Match the firmware to the exact router.
Similar product names do not guarantee compatible firmware. Treat the model number and supported branch as the primary decision points.
Check the full router model, not only the product family.
Confirm the firmware branch supports that model.
Keep stock recovery instructions available before flashing.
| Check | Why it matters | Safe approach |
|---|---|---|
| Exact model | Hardware and flash layouts differ | Use only a build intended for that model |
| Firmware branch | Support changes between releases | Review branch-specific compatibility |
| Current configuration | Major upgrades can expose old settings issues | Back up and be ready for a clean reset |
| Recovery method | A failed update can make normal access unavailable | Know the model recovery process in advance |
Use cases
Where Asus Merlin is most useful.
Advanced home networks
Refine DNS, VPN and administration behavior without replacing the familiar ASUSWRT layout.
VPN routing
Build more deliberate client and server routing workflows on supported hardware.
Network filtering
Use DNS and scripting foundations for compatible ad-blocking or filtering approaches.
Performance tuning
Evaluate queue management, acceleration and other settings against real throughput needs.
Installation / setup
Prepare first, flash second.
Small preparation steps make troubleshooting much easier if a firmware change does not behave as expected.
✓
Confirm the exact model.
Do not rely on a similar product name.
Do not rely on a similar product name.
✓
Back up the configuration.
Also record critical settings separately.
Also record critical settings separately.
✓
Use stable power.
Avoid firmware work during important network use.
Avoid firmware work during important network use.
✓
Prefer wired access.
Reduce the chance of a wireless interruption during the upload.
Reduce the chance of a wireless interruption during the upload.
Download
Download Asus Merlin project archive.
The button below is the only direct external download action on this website. The provided archive is the project source branch and should not be confused with a model-specific flashable firmware image.
Download Asus Merlin
Firmware changes deserve a recovery plan.
Always confirm the exact router model, keep stable power, back up settings, and know how to use the router's documented recovery or rescue workflow. A source archive is not the same thing as a ready-to-flash firmware image.
Download NowDecide based on your network needs.
Pros
- Familiar ASUSWRT experience
- Additional administration controls
- Useful VPN and scripting workflows
- Strong community knowledge base
Cons
- Not every router model is supported
- Firmware changes carry upgrade risk
- Some features require technical setup
- Performance gains are not guaranteed
Choose stability over version chasing.
Newer is not automatically better for every router. Read release notes, identify fixes relevant to your setup and avoid updating immediately before critical network use.
Download Latest ReleaseRouter not reachable after update
Allow sufficient reboot time, then try wired access and the normal router address before moving to the documented recovery method.
Settings appear missing
Check whether the option is model-specific or moved in the current branch. A clean reset may be useful after major upgrades.
VPN or DNS behavior changed
Review the updated configuration carefully and test one subsystem at a time rather than changing multiple settings together.
Performance is lower than expected
Recheck hardware acceleration, queue management, VPN encryption and client conditions before blaming the firmware alone.
Guides preview
Continue with focused Asus Merlin guides.
Use these articles for setup, features and compatibility topics without leaving the website.
Asus Merlin Setup Guide
A safe, model-first workflow for backup, upload, reboot and verification.
Read setup guide
Asus-Merlin Features
Review the controls and advanced options users most often explore.
Read features guide
Firmware Compatibility
Understand model, branch and hardware checks before firmware changes.
Read compatibility guideFrequently asked questions
Asus Merlin questions, grouped for faster answers.
Only one answer stays open at a time to keep the section easy to scan on desktop and mobile.
01
Installation & Compatibility
Model support, installation and upgrade safety.
Asus Merlin is enhanced firmware for supported ASUS routers. It builds on ASUSWRT while focusing on stability, practical administration features and additional controls for advanced home-network use.
Compatibility depends on the exact ASUS router model and supported firmware branch. Check the exact model before installing because firmware built for one router should not be used on another.
Begin by confirming model compatibility, backing up important settings, downloading the correct firmware, and using the router administration interface to perform the firmware upgrade.
On many supported models, moving back to official ASUS firmware is possible through the normal upgrade or recovery workflow. Keep a configuration backup and follow model-specific recovery guidance.
The interface remains familiar because the project is based on ASUSWRT. Additional settings are integrated into the existing administration experience rather than replacing it with a completely different interface.
Save a router configuration backup and separately note WAN details, Wi-Fi names, DNS settings, VPN profiles and custom scripts so you can rebuild the configuration if needed.
Router models differ in hardware, flash layout and drivers. Using the wrong image can cause a failed upgrade or recovery work, so exact model matching is an essential safety step.
A mobile browser can open the router administration page, but a wired desktop or laptop is usually safer for major firmware work because it reduces the chance of interruption.
Not every update requires a reset. Major version jumps, migration between significantly different builds or persistent problems may benefit from a clean reset and manual reconfiguration.
Gnuton is a community-maintained fork that extends Merlin-style firmware support to some router models outside the main project. Confirm support using the correct branch for your exact device.
02
Features & Operation
Performance, VPN, SQM, DNS and day-to-day use.
Common enhancements include additional VPN controls, custom scripting support, network monitoring, DNS options, administration refinements and compatibility with established add-on workflows.
SQM availability and implementation depend on the router model, branch and add-on approach. Queue-management choices should be balanced against hardware acceleration and throughput requirements.
The firmware provides DNS and scripting capabilities that can support network-level filtering workflows. Ad blocking is normally configured through compatible DNS services or community add-ons.
No. GitHub is associated with source code and development, while routine firmware installation is performed through the router administration page using a suitable model-specific firmware release.
It is not a guaranteed speed booster. Performance still depends on router hardware, radio conditions, client devices and configuration. Its main value is control, stability-focused development and advanced features.
Supported builds provide advanced VPN controls, including client and server workflows depending on router capability. Throughput varies with CPU performance, encryption type and connection settings.
Allow sufficient reboot time, then try a wired connection and the normal local router address. If it remains unavailable, use the model-specific recovery or rescue workflow instead of repeated power cycles.
Some options are model-specific or may move between firmware branches. A corrupted or incompatible configuration can also cause unusual behavior, which is why a clean reset may help after significant upgrades.
Update when a release includes fixes, security improvements or features relevant to your setup. Avoid performing upgrades immediately before critical network use and keep a backup available.
It can be used safely when the correct firmware is chosen for the exact router model, power is stable, backups are available and normal firmware-upgrade precautions are followed.