eir eir fibre box F5366s Login
The eir eir fibre box F5366s is a modem-router (gateway) whose admin page answers on 192.168.1.254. Each unit has its own admin password printed on the device label — there is no shared default.
192.168.1.254 Login
Login address: 192.168.1.254
Username / password: admin / On the label (unique)
Contents
eir eir fibre box F5366s default login
| Model | Login address | Username | Password | Source |
|---|---|---|---|---|
| eir fibre box F5366s | 192.168.1.254 | admin | On the label (unique) | Official doc |
Checked against eir fibre box F5366s User Manual (Sagemcom, hosted on eir.ie) — official on 31 Aug 2026 (high confidence), via the ssid.ai dataset (CC BY 4.0).
“Sagemcom-built 'fibre box' F5366s issued by eir (Ireland) — FTTH plus ADSL/ADSL2+/VDSL2, dual-band Wi-Fi 802.11n/ac, Gigabit LAN, USB media and a VoIP phone port.”
How to log in to the eir eir fibre box F5366s
- Connect to the eir eir fibre box F5366s by Wi-Fi or a network cable. On a phone, turn off mobile data.
- Open a browser and go to 192.168.1.254.
- Sign in with admin / On the label (unique).
- Open the Wireless or Wi-Fi section to change the network name and password.
If the login does not work
- Check the label first. This model has a unique password printed on the device — admin / admin will not work.
- Someone may have changed it. A factory reset restores the login above.
- Reset: hold the Reset button for about 10 seconds while the device is powered on.
- Wrong address? Check your default gateway — see how to find your router’s IP.
- Type
http://, not https://, and turn off any VPN or Private DNS.
More help
Frequently asked questions
What is the default password for the eir eir fibre box F5366s?
Username admin, password On the label (unique).
What is the eir eir fibre box F5366s IP address?
The admin page is at 192.168.1.254.
How do I reset the eir eir fibre box F5366s?
Hold the Reset button for about 10 seconds while the device is powered on.