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Zyxel documents 192.168.123.1 for the NBG7510 in Standard Router Mode. AP mode uses 192.168.123.2 or a DHCP-assigned address. Check the operating mode first and use the unit’s current local address after changes.
Use this HTTP address for a matching NBG7510 in Standard Router Mode. AP mode and changed installations use another current address; the current administrator password takes precedence.
Use the address for the current operating mode
Connect a client on the NBG7510’s local network and open the documented HTTP action above only for Standard Router Mode at this address. If the unit operates as an access point, use its documented AP-mode or current assigned address instead.
Do not change modes or reset the unit to force 192.168.123.1. The manual contains an inconsistent HTTPS 192.168.1.1 passage; use the cover and same section’s explicit HTTP 192.168.123.1 route for this scoped context.
Use the label or current login password
The username is admin. An unchanged unit uses the random Login Password on its label; use the current administrator password after setup. The Wi-Fi key is separate.
On an already configured unit, open Connection Status → System Info and expand it to inspect model, firmware, uptime and interface status. Stop before configuration controls. First entry can require a password change and is not part of this read-only task.
If 192.168.123.1 does not respond
Confirm the exact NBG7510, its current operating mode, local connection and current address. Use 192.168.123.2 or an assigned address only when the unit is actually in AP mode.
Do not bypass certificate warnings, reset the device or change its mode simply to make a historical or mismatched address respond.
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Zyxel NBG7510 User Guide V1.00 Ed 6