192.168.100.5 Admin Login

192.168.100.5 is a Class C private IPv4 address belonging to the 192.168.100.0/24 subnet — a range closely associated with cable modems and DOCSIS-based networking equipment. While 192.168.100.5 is not itself a widely published factory-default gateway, it lives in the same subnet as 192.168.100.1, which is the well-known default management IP used by brands such as Motorola, Arris, Netgear, ZyXEL, TP-Link, and Huawei on their cable modem and modem-router combo devices. In many real-world setups, 192.168.100.5 is dynamically assigned by the modem's DHCP server to a downstream router or connected device — for example, a Netgear Nighthawk router placed behind an Arris SURFboard or a Motorola cable modem will often receive 192.168.100.5 as its WAN-side IP. Because only one device can hold any given IP at a time, you must ensure no two devices on your network share 192.168.100.5 to avoid an IP address conflict. Other commonly referenced addresses in this space include 192.168.100.1 (the modem gateway) and 192.168.1.254.

How to Access 192.168.100.5

To reach the admin panel at 192.168.100.5, open any web browser and type http://192.168.100.5 directly into the address bar — do not use a search engine, as that will not route you to your local device. Press Enter and you should be presented with a login prompt. If your device is a cable modem or modem-router combo from Arris, Motorola, or Netgear and it has been manually configured to use 192.168.100.5, you will typically be asked for a username and password. The most common default credentials are admin / admin, admin / password, or admin / motorola depending on the brand. Always check the label on the bottom or back of your device for the exact factory defaults. Once logged in, you can manage wireless settings, change your Wi-Fi password, configure port forwarding, update firmware, and adjust DHCP settings. Because 192.168.100.5 is a private IP address, it is only reachable from within your local network — you cannot access it from the internet.

Router Brands Associated with the 192.168.100.x Subnet

The 192.168.100.0/24 subnet is most strongly associated with DOCSIS cable modem equipment. Here are the key brands you are likely dealing with if your device is using 192.168.100.5:

• Arris / SURFboard — Arris cable modems (e.g., SB8200, SBG8300, TM802) use 192.168.100.1 as their internal management address. When a router is connected to an Arris modem, the modem's DHCP server temporarily assigns an address in the 192.168.100.x range — such as 192.168.100.5 — to the router's WAN port. Arris officially documents this behavior and provides workarounds for accessing the modem status page at 192.168.100.1 from behind a downstream router.
• Motorola — Motorola cable modems and modem-router combos (e.g., MB8600, MG7700) also default to the 192.168.100.x subnet for their internal interface. If you have a Motorola device, 192.168.100.5 may be the WAN IP assigned to a router connected to it, or a manually configured LAN address.
• Netgear — Netgear cable modems such as the CM1000 and CM1200 use 192.168.100.1 as their gateway and assign addresses in the 192.168.100.x range to connected routers. Netgear itself warns users that placing a router with a 192.168.100.x LAN behind one of these modems can cause a subnet conflict.
• ZyXEL — Certain ZyXEL modem-router combos and DSL gateways use 192.168.100.1 as their default gateway, placing all connected devices — including those at 192.168.100.5 — within the same /24 subnet.
• Huawei — Some Huawei broadband gateways and ONT (Optical Network Terminal) devices issued by ISPs use the 192.168.100.x range, particularly in markets where ISPs pre-configure the equipment.
• TP-Link — Certain TP-Link modem-router combos and ISP-provisioned devices also operate within the 192.168.100.x subnet, especially when deployed by cable or fiber ISPs.

If you are unsure which brand you have, check the label on the bottom of your device or consult your ISP's documentation.

If You Can't Access 192.168.100.5

If typing http://192.168.100.5 into your browser returns an error or a blank page, work through the following steps:

1. Confirm your gateway address. Open a Command Prompt (Windows: press Win + R, type cmd, press Enter, then type ipconfig /all) or a Terminal (macOS/Linux: type ip route or netstat -nr). Look for the Default Gateway field. If it shows something other than 192.168.100.5, that is your actual gateway — not this address. You can also check our guide to find your router IP address.
2. Check your cable connection. Make sure your computer or router is physically connected to the device at 192.168.100.5 via Ethernet, or that you are connected to its Wi-Fi network. A wireless connection to a different network will prevent access.
3. Disable VPN or proxy software. Active VPN clients or proxy settings can reroute traffic away from your local subnet, making 192.168.100.5 unreachable. Temporarily disable any VPN and try again.
4. Try HTTPS. Some newer modem-router combos from Arris, Motorola, and Netgear require a secure connection. Try https://192.168.100.5 instead, and accept any browser security warning about the self-signed certificate.
5. Clear your browser cache. Cached DNS or redirect data can sometimes prevent the login page from loading. Try a different browser or open an incognito/private window.
6. Check for subnet conflicts. If your router's LAN is also set to the 192.168.100.x range (e.g., 192.168.100.1 as the LAN gateway), you will experience a double-NAT subnet conflict. Change your router's LAN subnet to 192.168.1.x or 10.0.0.x to resolve this.

Changing Your Router's Password at 192.168.100.5

Keeping the default password on any device accessible at 192.168.100.5 is a serious security risk. Anyone connected to your local network can attempt to log in using well-known default credentials. To change your password, follow these steps:

1. Log in to the admin panel at http://192.168.100.5 using your current username and password.
2. Navigate to the Administration, Management, or System section — the exact label depends on your brand (Arris, Motorola, Netgear, ZyXEL, etc.).
3. Look for a Change Password or Admin Password option.
4. Enter your current password, then type your new password twice to confirm. Choose a strong password of at least 12 characters, mixing uppercase, lowercase, numbers, and symbols.
5. Save your changes. You will be prompted to log in again with the new password.

Also consider changing your Wi-Fi password (WPA2/WPA3 key) from the Wireless settings section if your device at 192.168.100.5 is a combined modem-router. A strong, unique Wi-Fi password prevents unauthorized users from joining your network and accessing the admin panel.

Router Username and Password List

Factory Reset Procedures for Devices on 192.168.100.5

If you have forgotten the admin password for the device at 192.168.100.5, a factory reset will restore all settings — including the IP address, username, and password — to their manufacturer defaults. Here is how to perform a reset for the most common brands in the 192.168.100.x subnet:

• Arris (SURFboard SB8200, SBG8300, TM802 series): Locate the Reset button on the rear panel. Using a straightened paperclip or pin, press and hold the button for 10–15 seconds until the front LEDs flash and the device reboots. After the reset, the modem returns to its factory state. Note that Arris cable modems may need to re-register with your ISP after a reset, which can take several minutes.
• Motorola (MB8600, MG7700 series): Press and hold the Reset pinhole button on the rear of the device for 10 seconds. Release when the Power LED begins to flash. The device will reboot and restore factory defaults, including the 192.168.100.x subnet configuration.
• Netgear (CM1000, CM1200 series): Press and hold the Factory Reset button (located on the rear) for 7 seconds using a pin. The Power LED will blink amber, then turn green when the reset is complete. After the reset, the modem's gateway returns to 192.168.100.1 and will re-assign addresses in the 192.168.100.x range.
• ZyXEL (modem-router combos): Hold the Reset button for 10 seconds until the SYS LED turns red, then release. The device reboots with factory settings restored.
• Huawei (ISP-provisioned gateways): Press and hold the Reset button for 6–10 seconds. The device will reboot. Note that ISP-locked Huawei devices may require your ISP to re-provision the device after a reset.

After any factory reset, remember to reconfigure your Wi-Fi name (SSID), Wi-Fi password, and any custom settings such as port forwarding rules or static IP assignments.

Understanding 192.168.100.5 as a Private IP Address

192.168.100.5 is a Class C private IPv4 address, defined by RFC 1918 as part of the reserved private address space. The full Class C private range spans from 192.168.0.0 to 192.168.255.255, and 192.168.100.5 sits within the 192.168.100.0/24 subnet, which supports up to 254 usable host addresses (192.168.100.1 through 192.168.100.254).

Because it is a private address, 192.168.100.5 cannot be routed over the public internet. Any device using this address communicates only within your local network. To reach the internet, your router or modem performs Network Address Translation (NAT), substituting the private 192.168.100.5 address with your public IP before packets leave your network.

In the context of the 192.168.100.0/24 subnet, addresses are typically distributed as follows:

• 192.168.100.1 — The default gateway (modem or router management interface, used by Arris, Motorola, Netgear, ZyXEL, Huawei, and TP-Link devices)
• 192.168.100.2 – 192.168.100.5 — Often the first addresses assigned by DHCP to connected routers or devices; 192.168.100.5 is a common WAN-side IP for a router placed behind a cable modem
• 192.168.100.6 – 192.168.100.253 — General DHCP pool for client devices
• 192.168.100.254 — Sometimes used as an alternate gateway address by certain ISP-provisioned equipment

Understanding where 192.168.100.5 sits in this hierarchy helps you troubleshoot connectivity issues, avoid subnet conflicts, and correctly configure devices in a multi-router or modem-plus-router setup.

Related IP Addresses in the 192.168.100.x Subnet

If 192.168.100.5 is not the correct address for your device, the following related IPs in the same subnet or nearby ranges may be relevant to your setup:

• 192.168.100.1 — The primary default gateway for the 192.168.100.0/24 subnet, used by Arris, Motorola, Netgear, ZyXEL, Huawei, and TP-Link cable modems and modem-router combos. This is the most likely address for your modem's admin panel.
• 192.168.1.254 — A common alternate gateway used by some Arris and other ISP-provisioned routers on the 192.168.1.x subnet.
• 192.168.1.1 — The most widely used default gateway across all router brands worldwide, including TP-Link, Netgear, Linksys, and many others.
• 192.168.0.1 — Another extremely common default gateway, used by Netgear, D-Link, and others on the 192.168.0.x subnet.
• 10.0.0.1 — A Class A private gateway used by some ISP-provided equipment and Xfinity/Comcast gateways.
• 192.168.8.1 — Default gateway for Huawei mobile Wi-Fi (MiFi) devices and some Huawei home routers.
• 192.168.10.1 — Used by some Cisco, Ubiquiti, and other enterprise-grade networking equipment.

Frequently Asked Questions About 192.168.100.5

What device uses 192.168.100.5?

192.168.100.5 is most commonly seen as a DHCP-assigned WAN address given to a router (such as a Netgear Nighthawk) that is connected behind a cable modem from Arris, Motorola, or Netgear. The modem itself typically sits at 192.168.100.1 and assigns 192.168.100.5 (or another address in the 192.168.100.x range) to the first device plugged into it. It can also be manually configured as a static IP on any device within the 192.168.100.0/24 subnet.

Is 192.168.100.5 safe to use?

Yes. As a private RFC 1918 address, 192.168.100.5 is not accessible from the public internet and poses no inherent security risk simply by existing on your network. However, you should always protect the admin panel of any device at this address with a strong, unique password to prevent unauthorized access from within your local network.

Why does my router get assigned 192.168.100.5?

If your router's WAN port is connected to a cable modem from Arris, Motorola, or Netgear, the modem's built-in DHCP server will assign your router a temporary IP in the 192.168.100.x range — often 192.168.100.5 — as part of the provisioning process. This is normal behavior for DOCSIS cable modems. Your router then uses NAT to share its own internet connection with all devices on your home network.

Can I change my device's IP from 192.168.100.5 to something else?

Yes. Log in to the admin panel of your device (at http://192.168.100.5 or via your modem's interface at 192.168.100.1) and navigate to the LAN or Network settings. You can assign a different static IP within the 192.168.100.0/24 range, or switch to a completely different subnet such as 192.168.1.x. Be aware that changing the IP will require you to use the new address to access the admin panel going forward.

What is the difference between 192.168.100.5 and 192.168.100.1?

192.168.100.1 is the default gateway — the address of the modem or router that manages the 192.168.100.0/24 subnet and provides internet access. 192.168.100.5 is a host address within that same subnet, typically assigned to a connected device such as a downstream router or a computer. Think of 192.168.100.1 as the front door of your network and 192.168.100.5 as one of the rooms inside.

How do I avoid a subnet conflict with 192.168.100.5?

A subnet conflict occurs when your cable modem (at 192.168.100.1) and your router's LAN are both using the 192.168.100.x range. To fix this, log in to your router's admin panel and change its LAN IP address to a different subnet — for example, 192.168.1.1 or 10.0.0.1. This ensures the modem's 192.168.100.x subnet and your router's LAN subnet do not overlap, which is a common issue reported by users of Netgear, Arris, and Motorola equipment.