Zyxel Router Login

Zyxel is a Taiwanese networking company that surprises people at login: the default password on most of their routers is 1234, not "admin" or "password" like almost every other brand. If you've been trying admin/admin on a Zyxel and getting nowhere, that's the reason. Username is admin, password is 1234 — on consumer routers. ISP-deployed Zyxel units (including the CenturyLink C3000Z) have a unique password printed on the device label.

The admin IP is 192.168.1.1 for most home models. Some DSL gateways deployed by ISPs may use 192.168.0.1 or a different address. Zyxel covers a wide range — everything from budget home routers to serious business firewalls (the USG/ATP series used in small offices).

Zyxel Admin: 192.168.1.1
Username: admin  |  Default password: 1234 (consumer) or on device label (ISP)  |  Some models: 192.168.0.1

Default Credentials by Series

SeriesModelsUsernamePasswordAdmin IP
NBG (home routers)NBG6615, NBG6817, NBG7815 (AX)admin1234192.168.1.1
VMG (DSL gateways)VMG1312, VMG3925, VMG8825admin1234 or on label192.168.1.1
C3000Z (CenturyLink)CenturyLink/Quantum Fiber DSL/fiberadminOn device label192.168.0.1
USG Flex / ATP (business)USG Flex 100, 200, 500; ATP100admin1234192.168.1.1
VPN series (business)VPN50, VPN100, VPN300admin1234192.168.1.1

Zyxel's Product Range Explained

Zyxel makes equipment for several distinct markets, and it's worth knowing which category you have:

  • NBG series (home routers) — Standard consumer WiFi routers, sold retail. The NBG7815 is their flagship AX6000 WiFi 6 unit. Managed via the Zyxel web UI or Zyxel Connect app.
  • VMG series (DSL gateways) — Deployed by ISPs for DSL or fiber connections. Same web interface as NBG, but WAN settings are pre-configured by the ISP. Often locked from changing ISP-specific settings.
  • C3000Z (CenturyLink) — Zyxel-built gateway deployed for CenturyLink / Quantum Fiber DSL. Uses a unique label password, not 1234. Admin IP is 192.168.0.1. See the CenturyLink login guide for full details.
  • USG / ATP / VPN series (business) — Security gateways with full firewall, SSL VPN, IDP, and content filtering. Managed via web GUI or Zyxel's Nebula cloud platform. These are not home devices — they sit at network edges in small offices.

How to Log In

  1. Connect to the Zyxel WiFi or via ethernet
  2. Open a browser and go to http://192.168.1.1
  3. Username: admin
  4. Password: 1234 (or the label password on ISP-deployed units)
  5. On current firmware, Zyxel will prompt you to change the default password immediately after login

Zyxel Nebula (Cloud Management)

Zyxel's Nebula platform allows cloud-managed deployment of Nebula-capable APs, switches, and security gateways from a central dashboard. Useful for businesses with multiple locations or IT teams managing multiple sites. Nebula-enabled devices show a cloud icon in the admin UI and can be claimed to a Nebula organization. Free tier available for small deployments.

Change WiFi Password

  1. Log in at 192.168.1.1
  2. Go to Network Setting → Wireless → General
  3. Update the Pre-Shared Key field
  4. Click Apply for each band

Troubleshooting

ProblemFix
admin/admin rejectedZyxel default is 1234, not admin — try admin/1234
1234 also rejectedISP-deployed model or password was changed — check label, or factory reset
C3000Z (CenturyLink) loginUse 192.168.0.1, not 192.168.1.1 — and label password, not 1234
USG shows certificate warningBusiness Zyxel devices use HTTPS with self-signed cert — accept the browser exception
Nebula cloud locked down settingsSettings managed by Nebula are read-only on the local interface — change from Nebula dashboard

Factory Reset

Press and hold the reset button (back or bottom of device) for 5–10 seconds with power on. LEDs flash and the device reboots. After reset, admin/1234 credentials apply (or the label password on ISP models). All custom settings — WiFi, port forwarding, firewall rules — are erased.