How to Set Up, Activate & Change WiFi Password on the Arris DG3450 (2026 Guide)

Key Takeaways:

• The Arris DG3450 is a DOCSIS 3.1 modem/router combo (gateway) with a default admin login at 192.168.0.1 using username "admin" and password "password." You can change your WiFi name and password through this admin panel in under two minutes.
• The DG3450 is compatible with most major cable internet providers including Spectrum, Cox, Mediacom, Midco, Sparklight, WOW, RCN/Astound, Breezeline, and others. It is not compatible with fiber or DSL services like Verizon Fios, AT&T Fiber, or CenturyLink.
• Bridge mode can be enabled through the admin panel under Gateway > Summary, which disables the built-in router and WiFi so you can use your own router or mesh system instead.

In this article:

What Is the Arris DG3450?

The Arris Touchstone DG3450 is a DOCSIS 3.1 cable modem gateway. That means it combines a cable modem and a wireless router into a single device. Instead of needing two separate boxes, the DG3450 handles both your internet connection and your home WiFi network.

Here are the key specs:

• DOCSIS 3.1 with backward compatibility for DOCSIS 3.0 networks
• Dual-band WiFi (2.4 GHz and 5 GHz) with 802.11ac Wave 2 and 4x4 MU-MIMO
• 4 Gigabit Ethernet ports for wired connections
• MoCA 2.0 support for networking over existing coaxial wiring
• Built-in firewall with WPA2 encryption and parental controls
• Supports internet plans up to 1 Gbps

The DG3450 is commonly provided as a rental unit by cable companies, but it can also be purchased as a refurbished unit to eliminate monthly equipment rental fees.

Compatible Internet Providers

The Arris DG3450 works with most major U.S. cable internet providers that use DOCSIS technology. Compatible providers include:

• Spectrum
• Cox
• Mediacom
• Midco
• Sparklight (formerly Cable ONE)
• WOW (WideOpenWest)
• RCN / Astound Broadband
• Breezeline
• Atlantic Broadband
• Comporium
• TOAST.net

Important: The DG3450 is a cable modem gateway. It is not compatible with fiber or DSL internet services. This means it will not work with Verizon Fios, AT&T Fiber, CenturyLink, Frontier Fiber, Google Fiber, or any DSL-based provider. Xfinity (Comcast) compatibility varies by region and firmware version, so always confirm directly with your provider before purchasing.

If you are unsure whether the DG3450 is supported on your plan, call your internet provider and give them the modem's MAC address (printed on the label on the bottom of the device) so they can verify compatibility.

Hardware Setup and Installation

Setting up the DG3450 hardware takes about 15 to 20 minutes. Here is what you need to do:

Step 1: Choose a Location

Place the gateway in a central location in your home, off the floor, and near an active coaxial cable outlet. Avoid enclosed cabinets or areas near microwaves and cordless phones, which can cause WiFi interference.

Step 2: Connect the Coaxial Cable

Screw one end of the coaxial cable into the wall outlet and the other end into the coax port on the back of the DG3450. Make sure both connections are finger-tight.

Step 3: Plug In the Power Cord

Connect the power adapter to the gateway and plug it into a wall outlet. Avoid using a power strip if possible.

Step 4: Wait for the Online Light

After powering on, the Online light on the front of the device will blink blue while it establishes a connection. Wait up to 15 minutes for the Online light to turn solid green. A solid green light means the gateway has successfully connected to your provider's network.

Step 5 (Optional): Connect a Device via Ethernet

If you want a wired connection, plug an Ethernet cable from one of the four LAN ports on the back of the DG3450 into your computer, gaming console, or smart TV.

Tip: Before you put the gateway in its final spot, take a photo of the white label on the bottom. It shows your default WiFi network name (SSID) and password (Pre-Shared Key), which you will need to connect your devices.

How to Activate the DG3450 With Your ISP

If you purchased the DG3450 on your own (rather than renting it from your provider), you will need to activate it with your internet service provider. The process is similar across most cable providers.

What You Will Need

• Your account number with your internet provider
• The MAC address printed on the DG3450's bottom label (sometimes labeled as CM MAC or HFC MAC)
• The serial number (S/N) from the same label

Activation by Provider

Spectrum

Connect and power on the DG3450, then visit spectrum.net/selfinstall from a device connected to the gateway. Follow the on-screen prompts. You can also call Spectrum at 1-855-757-7328.

Cox

Visit cox.com/activate or call Cox at 1-800-234-3993. Provide your MAC address and account number to complete activation.

Mediacom

Call Mediacom at 1-855-633-4226 and provide your MAC address and account information. A technician will provision the modem on their end.

Midco

Visit midco.com/setup from a device connected to your new gateway and follow the self-install steps.

Sparklight (formerly Cable ONE)

Call Sparklight at 1-877-692-2253 with your MAC address and account details. They will activate the modem remotely.

All Other Providers

For any other compatible cable provider (WOW, RCN/Astound, Breezeline, Comporium, etc.), call their customer support number. Have your account number, the DG3450's MAC address, and serial number ready. The representative will register the device on your account and push a configuration to the modem. After activation, the Online light should turn solid green within a few minutes.

Note: If activation does not complete within 20 minutes, power cycle the DG3450 by unplugging it for 30 seconds, then plugging it back in. Wait another 15 minutes for the Online light to go solid green.

How to Log In to the Arris DG3450 Admin Panel

You need to access the admin panel to change your WiFi password, network name, security settings, or enable bridge mode. Here is how to log in:

Step 1

Connect to the DG3450 via WiFi or Ethernet cable. Using an Ethernet cable is recommended to avoid losing your connection mid-setup.

Step 2

Open any web browser (Chrome, Firefox, Safari, Edge) and type 192.168.0.1 in the address bar. Press Enter.

Step 3

Enter the login credentials:

• Username: admin
• Password: password

If the default credentials do not work, your ISP may have set custom login details. Try the username cusadmin with the Pre-Shared Key (WiFi password) printed on the bottom label as the password. If neither works, you may need to factory reset the gateway (see the Factory Reset section below) or contact your internet provider.

Step 4

Once logged in, you will see the DG3450's admin dashboard where you can modify wireless settings, security options, and more.

How to Change Your WiFi Name and Password

After logging into the admin panel at 192.168.0.1:

Step 1

Navigate to Wireless in the left-hand menu (or top menu, depending on firmware version).

Step 2

Select the 2.4 GHz or 5 GHz radio. You will need to update each band separately since the DG3450 broadcasts two WiFi networks.

Step 3

To change your network name, find the Network Name (SSID) field and type your new name.

Step 4

To change your password, find the WPA Pre-Shared Key field (sometimes labeled "Passphrase" or "Security Key") and enter your new password. Use at least 12 characters with a mix of letters, numbers, and symbols for strong security.

Step 5

Make sure the security mode is set to WPA2-PSK (AES) or WPA2/WPA3 if available. Avoid using WEP or open security, as these are not secure.

Step 6

Click Save or Apply.

After saving, all devices currently connected to WiFi will be disconnected. You will need to reconnect each device using the new WiFi name and password.

Tip: Repeat the same steps for the other WiFi band (2.4 GHz or 5 GHz) if you want both networks to have the same name and password. Many users prefer to give both bands the same name so devices can automatically switch between them.

How to Set Up Bridge Mode on the Arris DG3450

Bridge mode turns off the DG3450's built-in router and WiFi, allowing it to function only as a modem. This is useful if you want to use your own router or mesh WiFi system (such as an Eero, Google Nest, TP-Link Deco, or similar) instead of the DG3450's built-in wireless.

Why Use Bridge Mode?

When you connect a separate router to a gateway that already has its own router built in, you create what is called a "double NAT" situation. This can cause issues with online gaming, video calls, port forwarding, and VPN connections. Bridge mode eliminates this problem by letting your own router handle all routing and WiFi duties.

How to Enable Bridge Mode

Step 1

Connect to the DG3450 via Ethernet cable (not WiFi, since WiFi will be disabled during this process).

Step 2

Open a browser and go to 192.168.0.1. Log in with your admin credentials.

Step 3

In the left sidebar, click on Gateway, then click Summary.

Step 4

Find the Bridge Mode section and click Enable.

Step 5

A warning will appear telling you that enabling bridge mode will disable WiFi and router functions. Click OK to confirm.

Step 6

The gateway will reboot. Once it comes back online, connect your personal router's WAN port to one of the DG3450's LAN ports using an Ethernet cable.

Important: Once bridge mode is enabled, you can no longer access the DG3450's admin panel at 192.168.0.1 through WiFi. You must connect directly via Ethernet. If you ever need to disable bridge mode, connect via Ethernet, go back to Gateway > Summary, and click Disable under Bridge Mode. Alternatively, performing a factory reset will also disable bridge mode and restore all default settings.

Note: Some ISPs may restrict access to bridge mode settings through firmware. If you do not see the Bridge Mode option, contact your provider and ask them to enable it on their end.

Arris DG3450 LED Light Meanings

The DG3450 has two main indicator lights on the front: the Online light and the WiFi light. Understanding what these lights mean can help you quickly identify problems.

Online Light

• Solid blue: The gateway is powered on and booting up.
• Slow blinking blue: The gateway is trying to acquire a downstream connection from your ISP.
• Fast blinking blue: The gateway is trying to acquire an upstream connection.
• Solid green: The gateway is online and connected to the internet. This is the normal operating state.
• Alternating blue and green: A firmware update is in progress. Do not unplug the device.
• Off: The gateway is not receiving power.

WiFi Light

• Solid blue: WiFi is active but no devices are sending or receiving data.
• Blinking blue: WiFi devices are connected and actively transferring data. This is normal during use.
• Off: WiFi is disabled (possibly because bridge mode is enabled or WiFi was turned off in settings).

Warning

If all LEDs are blinking blue rapidly at the same time, this indicates a grounding defect has been detected. Unplug the gateway immediately and do not use it until the grounding issue is resolved. Contact your ISP or an electrician for help.

Troubleshooting Common Arris DG3450 Issues

Online Light Is Blinking Blue (No Internet)

A blinking blue Online light means the gateway has not established a connection with your ISP. Try these steps:

1. Check that the coaxial cable is securely connected at both the wall outlet and the back of the gateway. Tighten both connections.
2. Try a different coaxial cable if available.
3. Try a different coaxial wall outlet. Not all outlets in your home may be active.
4. Power cycle the gateway: unplug it from power, wait 30 seconds, and plug it back in. Wait up to 15 minutes.
5. Check for a service outage with your ISP by visiting their website or calling their support line.
6. If the light continues blinking after 30 minutes, perform a factory reset (see below) and contact your ISP.

WiFi Is Connected but No Internet

If your device connects to the DG3450's WiFi network but cannot load any websites:

1. Check the Online light. If it is not solid green, the issue is between the gateway and your ISP (see above).
2. Power cycle the gateway by unplugging it for 30 seconds.
3. Restart the device you are trying to use (phone, laptop, etc.).
4. Try connecting a device directly via Ethernet cable to determine if the issue is with WiFi or the internet connection itself.
5. Log in to the admin panel at 192.168.0.1 and check the WAN/Internet status page to see if the gateway has received an IP address from your ISP.

Cannot Access 192.168.0.1

If you cannot reach the admin panel:

1. Make sure you are connected to the DG3450's network (via WiFi or Ethernet), not your mobile data.
2. Try a different browser or clear your browser cache.
3. Try typing http://192.168.0.1 (with http://) in the address bar.
4. If you are in bridge mode, you must connect via Ethernet to access the panel.
5. Restart the gateway and try again.

Gateway Will Not Power On

1. Verify the power adapter is firmly plugged into both the gateway and the wall outlet.
2. Try a different wall outlet.
3. Check the power adapter for any visible damage to the cord or connector.
4. If the LEDs flash blue briefly and then turn off, the power adapter may be faulty or the gateway may have a hardware failure. Try a different compatible power adapter if available. If the problem persists, the unit may need to be replaced.

Slow WiFi Speeds

1. Connect to the 5 GHz WiFi band instead of 2.4 GHz for faster speeds at shorter range.
2. Move closer to the gateway or reduce obstacles between your device and the gateway.
3. Reduce interference from microwaves, baby monitors, and cordless phones.
4. Check how many devices are connected. Too many simultaneous connections can slow things down.
5. Run a speed test at speedtest.net using an Ethernet connection to test if the issue is with WiFi performance or your overall internet speed. If wired speeds are fine but WiFi is slow, the issue is wireless interference or range.
6. Log in to the admin panel and check for a firmware update if the option is available.

Firmware Update Stuck (Alternating Blue and Green)

If the Online light is alternating between blue and green for more than 60 minutes:

1. Do not unplug the gateway during the first 60 minutes, as this could corrupt the firmware.
2. After 60 minutes, if the light is still alternating, unplug the gateway, wait 30 seconds, and plug it back in.
3. If the issue persists after a reboot, contact your ISP. They may need to repush the firmware to the device.

How to Factory Reset the Arris DG3450

A factory reset erases all custom settings including your WiFi name, WiFi password, admin password, port forwarding rules, and bridge mode configuration. Only do this if other troubleshooting steps have failed or you need to start fresh.

Steps

1. With the gateway powered on, locate the small Reset button on the back of the device.
2. Use a paperclip or pen tip to press and hold the Reset button for at least 15 seconds.
3. Release the button. The gateway will reboot and restore all settings to factory defaults.
4. Wait up to 15 minutes for the Online light to turn solid green.
5. Reconnect to WiFi using the default network name and password printed on the bottom label of the gateway.
6. Log back into the admin panel at 192.168.0.1 using the default credentials (username: admin, password: password) and reconfigure your settings.

Frequently Asked Questions

What is the default login for the Arris DG3450?

The default IP address is 192.168.0.1. The default username is "admin" and the default password is "password" (all lowercase). Some ISPs set the username to "cusadmin" with the Pre-Shared Key from the device label as the password. If neither works, a factory reset will restore the original defaults.

Is the Arris DG3450 a modem or a router?

It is both. The DG3450 is a gateway device that combines a DOCSIS 3.1 cable modem and a dual-band wireless router into a single unit. This means you do not need a separate router unless you want to use your own by enabling bridge mode.

Does the Arris DG3450 work with Xfinity?

Compatibility with Xfinity varies by region and firmware version. Some users have successfully used the DG3450 with Xfinity, while others have reported it is not on the approved modem list. Contact Xfinity directly and provide your device's MAC address to confirm before purchasing.

How do I find my Arris DG3450 WiFi password?

The default WiFi password (called the Pre-Shared Key) is printed on a label on the bottom of the gateway. If you changed the password and forgot it, log in to the admin panel at 192.168.0.1 to view or change it. If you cannot log in, perform a factory reset to restore the default password.

Can I use my own router with the Arris DG3450?

Yes. Enable bridge mode through the admin panel (Gateway > Summary > Bridge Mode > Enable). This disables the DG3450's built-in router and WiFi so your personal router handles all wireless and routing functions. Connect your router's WAN port to one of the DG3450's Ethernet ports.

Why is my Arris DG3450 Online light blinking blue and not turning green?

A blinking blue Online light means the gateway is trying to connect to your ISP's network but has not succeeded yet. This can be caused by a loose coaxial cable, an inactive cable outlet, a service outage in your area, or the modem not being activated on your account. Check all connections, try a different outlet, and contact your ISP to verify there is no outage and that the device is properly provisioned.

What does it mean when all lights on the DG3450 are blinking blue rapidly?

Rapidly blinking blue on all LEDs simultaneously indicates a grounding defect. This is a safety warning. Unplug the gateway immediately and do not use it until the grounding issue has been addressed. Contact your ISP or a qualified electrician to inspect the coaxial wiring and electrical grounding in your home.