- Networks
- Wi-Fi routers
WAN-ROJO
ASUS WAN-ROJO on Wi-Fi router: no IP or no physical connection
Risk level
Low
Usually safe to check without specialist tools.
Urgency
Medium
Quick answer
If the WAN (Internet) LED on your ASUS router is red, the router has no IP address or sees no cable on the WAN port. First check the network cable from the modem to the WAN port, then restart the modem and router in order.
Safety first
Stop and check this first
- The factory reset ASUS offers as a last step erases all router settings: you will have to set it up again with the QIS wizard.
- For PPPoE or static IP enter only the details your provider gave you; do not try to bypass their authentication and do not open the router casing.
Safe checks you can perform
- Check the WAN port cable
- Restart modem and router in order
- Test the Internet directly on the modem
- Check firmware and WAN connection type
Leave these tasks to a qualified professional
- Do not attempt this professional task: Line check with your provider
- Do not attempt this professional task: Open a case with ASUS support
What a technician must be able to justify
Technician visit
These are the steps they must carry out and show you. Tick them as they work: if steps are skipped, do not accept a part swap.
These are not instructions for opening or handling the equipment yourself. They are the checks that should support a technical conclusion.
Line check with your provider
What they doIf there is no Internet even with a computer plugged straight into the modem, the provider technician checks the line, the modem or ONT and your connection details.
They must show youthe line status and whether the modem hands out an IP or a PPPoE session.
In writingthe ticket number, the cause and the WAN connection details the router should use.
Open a case with ASUS support
What they doIf the line works directly on the modem and the WAN LED stays red with a good cable, current firmware and correct details, ASUS support reviews the router.
They must show youthe steps tried (cable, restart, direct connection, firmware) and the result of each.
In writingthe case number, the diagnosis and whether the router is covered by warranty or repair.
Before accepting a part or repair
Nothing has been shown yet. Do not accept a part swap based on the code alone.
Follow these steps
Note: Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.
Check the WAN port cable
- Who:
- you.
- How:
- make sure the network cable runs from the modem or ONT into the WAN (Internet) port of the ASUS router, not a LAN port; unplug it, seat it again firmly and, if you can, try another RJ45 cable.
- Result that matters:
- the WAN LED leaving red and lighting in its normal colour.
- If it changes with another cable or after reseating:
- the cable or the connection was the problem.
- If it stays red:
- restart the network in the order ASUS gives.
- Evidence to keep:
- photo of the back panel with the cables plugged in and of the WAN LED.
Evidence: RT-AX57 Dual Band Wi-Fi Router User Guide (E25463) · [Troubleshooting] Abnormal WAN LED on ASUS router
Restart modem and router in order
- Who:
- you.
- How:
- turn off and unplug the modem, turn off the router, plug in and turn on the modem and wait 2 minutes, then turn on the router and wait another 2 minutes before turning on the computers.
- Result that matters:
- the router requesting its IP again once the modem is ready.
- If the WAN LED is no longer red:
- the router now gets an IP.
- If it stays red:
- test the connection directly on the provider modem.
- Evidence to keep:
- time of the restart and the WAN LED colour after 2 minutes.
Evidence: RT-AX57 Dual Band Wi-Fi Router User Guide (E25463)
Test the Internet directly on the modem
- Who:
- you.
- How:
- connect a computer with a network cable straight to the provider modem or router, with the ASUS router out of the chain, and open a website.
- Result that matters:
- knowing whether the fault is on the line or in the ASUS router settings.
- If there is no Internet either:
- call your provider, the problem is on their side.
- If the Internet works:
- check the firmware and WAN settings of the ASUS router.
- Evidence to keep:
- note of the result and, if you call, the ticket number.
Evidence: [Troubleshooting] Failed Internet access through router
Check firmware and WAN connection type
- Who:
- you, from the web interface or the ASUS Router app.
- How:
- look for new firmware and confirm the WAN connection type matches what your provider gave you; with automatic IP, ASUS suggests changing the DHCP query frequency from Aggressive to Normal and restarting router and modem.
- Result that matters:
- ruling out WAN settings that do not match your line.
- If after updating or fixing the setting the WAN LED changes:
- keep that configuration.
- If it stays red with correct details:
- contact your provider or ASUS support.
- Evidence to keep:
- screenshot of the firmware version and the WAN connection type.
Evidence: [Troubleshooting] Abnormal WAN LED on ASUS router · [Troubleshooting] Failed Internet access through router
Still not solved
If the error persists, stop here. See what the technician must do and show you.
Where this code applies
A code is meaningful only inside the right product and version context.
Primary scope
- System
- Networks
- Brand
- ASUS
- Product type
- Wi-Fi routers
Known code variants
- ASUS led WAN rojo fijo
- ASUS luz WAN roja
- ASUS router internet LED red
- ASUS router no internet red light
- ASUS RT-AX57 red WAN LED
- ASUS RT-AX57 WAN en rojo
- ASUS RT-AX88U luz roja internet
- ASUS RT-AX88U red internet light
- ASUS WAN LED solid red
- ASUS WAN light red
- jazztel livebox plus wan light red
- jazztel ont no conectada puerto wan
- jazztel router wan red light
- jazztel wan rojo fijo
- jazztel wan solid red
- livebox + jazztel luz wan roja
- livebox + ont not connected to wan port
- livebox plus wan rojo
- router ASUS led internet rojo
- router ASUS sin internet luz roja
- router jazztel luz wan roja
What it means
In the RT-AX57 user guide, ASUS defines a red WAN (Internet) LED as no IP or no physical connection: the WAN port sees no link to the modem or ONT, or the router gets no address from the provider (DHCP, PPPoE or static IP). ASUS has an official guide for an abnormal WAN LED, using the RT-AX88U as the example and covering its Wi-Fi routers; the exact LED differs by model, so check your manual. The LED alone never proves the router is faulty.
Warnings and stop conditions
- Mediumsource verified
The factory reset ASUS offers as a last step erases all router settings: you will have to set it up again with the QIS wizard.
Evidence: [Troubleshooting] Failed Internet access through router
- Mediumsource verified
For PPPoE or static IP enter only the details your provider gave you; do not try to bypass their authentication and do not open the router casing.
Evidence: [Troubleshooting] Failed Internet access through router
Symptoms and causes
Probable causes · in order
- Loose or damaged modem to WAN cableCommon
ASUS asks you to confirm the modem goes to the WAN port with an RJ45 cable in good condition, with no damaged pins; with no physical link the LED turns red.
Evidence: RT-AX57 Dual Band Wi-Fi Router User Guide (E25463) · [Troubleshooting] Abnormal WAN LED on ASUS router
- Router gets no IP from the providerCommon
The manual links red to having no IP; ASUS notes the modem may ignore DHCP requests when too many arrive in a short time.
Evidence: RT-AX57 Dual Band Wi-Fi Router User Guide (E25463) · [Troubleshooting] Failed Internet access through router
- Wrong provider connection detailsPossible
ASUS asks you to check in the web interface that the WAN connection type (automatic IP, PPPoE or static IP) and its details match your provider.
Evidence: [Troubleshooting] Abnormal WAN LED on ASUS router · [Troubleshooting] Failed Internet access through router
- Outdated router firmwarePossible
The first step in the ASUS guide for an abnormal WAN LED is to make sure the router firmware is the latest version available.
Evidence: [Troubleshooting] Abnormal WAN LED on ASUS router
- Outage or fault on the provider linePossible
ASUS suggests connecting a computer straight to the provider modem; if there is still no Internet, the problem has to be raised with the provider.
Evidence: [Troubleshooting] Failed Internet access through router
Virtual technician
Does WAN-ROJO still appear after these checks?
Answer a few questions to narrow down the likely cause and the safest next action. Guidance only - it never replaces a professional.
Sources and technical references
- 1
RT-AX57 Dual Band Wi-Fi Router User Guide (E25463)
ASUS · 2024 · manual
- 2
[Troubleshooting] Abnormal WAN LED on ASUS router
ASUS · 2023 · official_doc
- 3
[Troubleshooting] Anomalía en el LED WAN en routers ASUS
ASUS · 2021 · official_doc
- 4
[Troubleshooting] Failed Internet access through router
ASUS · 2026 · official_doc
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