SBG7400-AC2
SURFboard Cable Modem and Wi-Fi Router with ARRIS Secure Home Internet by McAfee

Thumbnail for the Arris SBG7400-AC2 router with Gigabit WiFi, 4 N/A ETH-ports and
0 USB-ports

The Arris SBG7400-AC2 router has Gigabit WiFi, 4 N/A ETH-ports and 0 USB-ports. It has a total combined WiFi throughput of 2400 Mpbs.
It is also known as the Arris SURFboard Cable Modem and Wi-Fi Router with ARRIS Secure Home Internet by McAfee.

Quick links:
Default password/Login
User Manuals

SBG7400-AC2 router specifications (specs)

System specs
CPU: n/a
RAM: n/a
Flash: n/a
Custom firmwares: None

Connectivity
WiFi: Gigabit (abgn+ac)
WiFi bands: 2.4GHz & 5GHz
WiFi throughput: 2400 Mpbs
WAN: None
ETH: 4 x N/A ports
USB-ports: 0

Hard reset instructions for Arris SBG7400-AC2

If your SBG7400-AC2 router is not working as it should, dropping connections or not being responsive, you should first do a reset of the router to see if the problems persist. Other scenarios where you might want to reset your router is if you've forgotten the password or misconfigured it and can't get access anymore.
Your can reset your Arris SBG7400-AC2 in the following way(s):

The 30-30-30 reset

There are no specific instructions for this model yet, but you can always do the 30-30-30 reset as follows:

When router is powered on, press the reset button and hold for 30 seconds. (Use a paper clip or something sharp)
While holding the reset button pressed, unplug the power of the router and hold the reset button for 30 seconds
While still holding the reset button down, turn on the power to the unit again and hold for another 30 seconds.

This process usually works for resetting any router to it's factory setting.

Note: It is worth reading more about how to reset routers with the 30 30 30 reset and what the risks and considerations are when resetting your router this way, instead of just rebooting it.

Default factory settings for Arris SBG7400-AC2

If you have performed a reset of your SBG7400-AC2 device or not changed the defaults, you should be able to access it with the following settings:

Default subnet mask: 255.255.255.0

Note: If you are using the default settings you should change them to increase security and prevent unathorized access to your network.

SBG7400-AC2 Firmwares

Staying up to date with the latest firmware is a good idea to keep your router even more secure from various security flaws.
If you want to squeeze a little bit of extra functionality out of your router, consider flashing an open-source firmware like dd-wrt, openWRT or LEDE. Flashing a custom ROM can greatly increase the stability and functionality of your old router.
Following are the firmwares that we have identified existing for the Arris SBG7400-AC2:

Arris stock firmware for the SBG7400-AC2

Stock firmwares for the SBG7400-AC2 are available under the download section on the modem's support page. You can also refer to the router's manual for instructions on how to upgrade the firmware.