How to Change Your Router's IP Address: A Step-by-Step Guide

Modifying the default gateway network address is a basic, yet often overlooked, procedure when building a complex home or small office infrastructure. Many users have been using factory settings for years, such as 192.168.0.1 or 192.168.1.1, even when network design logic requires it. Changing a router's IP address becomes critical when merging two networks to avoid address conflicts, or when cascading routers, where each tier must be in its own unique subnet.

Changing the gateway address doesn't require in-depth knowledge of network protocols, but it does require careful handling. Errors in subnet mask settings or incorrectly entered addresses can lead to complete loss of access to the device's administrative panel. In this article, we'll cover not only the steps but also the theoretical aspects that will help you understand why your network stops working under certain configurations.

Before you begin setup, it's important to understand that you're changing your router's "home address" on the local network. All connected devices may lose internet access after changing these settings until they update their DHCP settings or reconnect. Planning new addressing — a key step that will prevent chaos in connected gadgets and smart technology.

Why change the default gateway IP address?

The main reason network administrators change the default address is to extend coverage with a second router. If you connect a second router to the first with a LAN-to-LAN cable, their local network IP addresses must not match. Otherwise, a conflict will occur, and devices will not be able to determine where to send data packets. In this situation, changing the second router's address to a unique one (e.g., 192.168.1.2 provided that the first one has 192.168.1.1) is mandatory.

Another important reason is security. While changing the address isn't a complete defense against hackers, it does hide the admin panel from automated scripts that scan standard ports and addresses for vulnerabilities. An attacker would have to guess which address your account is located on. router, which adds an additional, though not critical, level of complexity.

⚠️ Please note: If you change your router's IP address, all devices using static addresses will lose internet access. You will need to manually configure the new gateway settings on each such device (printers, security cameras, network storage devices).

Changing the subnet may also be necessary for proper traffic segmentation. You can allocate a separate address range for guest users or for IoT devices (smart light bulbs, sockets), which often have firmware vulnerabilities. This allows you to isolate potentially dangerous devices from your personal computers and smartphones, where important data is stored.

Preparing to change network settings

Before making any changes to your router's configuration, you need to do some preparatory work. The most common mistake is changing settings while connected to a Wi-Fi network. When the new settings are applied, the router will restart the network interface, and your wireless connection will be lost. You'll lose access to the admin panel, as your computer or phone will remain connected to the old address, while the router will have switched to the new one.

The ideal setup option is to use a wired connection. Take an Ethernet cable and connect your computer directly to one of the router's LAN ports. This ensures a stable connection even when the device's network services are rebooted. If this isn't possible, make sure you know the exact MAC address of your Wi-Fi adapter so you can quickly assign a static IP address to the device to access a new subnet if necessary.

You'll also need to know the current gateway address and control panel login information. These are usually found on a sticker on the bottom of the device. Standard combinations often look like this: admin/admin or admin/passwordIf you have previously changed your password and do not remember it, you may need to perform a factory reset by holding down the button Reset on the body.

Step-by-step instructions for changing your IP address

The process of changing the gateway address is almost identical for most router models, whether Keenetic, MikroTik, TP-Link or AsusDifferences may only apply to menu layout and terminology, but the logic remains the same. First, you need to log in to the web interface by entering your current IP address in the browser's address bar.

Once you've logged in, find the section responsible for your local network settings. It may be called LAN, Local area network, Network or IP ConfigurationThis is where the router's current IP address is located. You need to replace the last digit (octet) or change the third group of numbers to switch to a different subnet. For example, by changing 192.168.0.1 on 192.168.5.1.

After entering a new value, be sure to check the subnet mask. For home networks, the standard is 255.255.255.0Unless you're an experienced network engineer, changing the mask is not recommended, as it will change the number of addresses available to clients. After applying the settings, the router will likely prompt you to reboot or reconnect.

It's important to understand that after clicking "Save" or "Apply," you'll immediately lose connection to your device. The browser will attempt to access the old address, which no longer exists. You'll have to manually enter the new IP address in the address bar to continue browsing or check the interface's availability.

Configuring a DHCP server after changing the address

One critical aspect is properly configuring the DHCP server. This service automatically assigns IP addresses to all connected devices. If you change the router's IP address but leave the DHCP address pool in the old subnet, your devices will receive addresses incompatible with the new gateway. As a result, the internet will not work, although a connection to the router will formally be established.

You need to go to the DHCP settings (often located in the same section as LAN) and change the start and end addresses of the pool. For example, if the router's new IP has become 192.168.10.1, then the DHCP pool should look something like this: from 192.168.10.100 to 192.168.10.200. Make sure the third octet (number 10 in this example) matches in all fields.

Don't forget about the lease time. If you frequently change network settings, it makes sense to reduce this parameter to ensure devices receive the latest settings more quickly. However, for a stable home network, the default value of several days or weeks is optimal, as it reduces the load on the router's processor.

What to do if DHCP does not assign addresses?

If devices connect but don't receive an IP address, check if the DHCP server is enabled on another router in the network. Two active DHCP servers on the same network segment will cause chaos and internet outage for all clients.

Configuration features of popular router models

Interfaces from different manufacturers can vary significantly, which often confuses users. On devices TP-Link with a green interface you need to look for a tab Network -> LANIn the new blue interfaces (Tether OS) the path may look like this Advanced -> Network -> LAN SettingsEverything is quite transparent here and only requires entering a new IP.

In routers Asus with firmware AsusWRT The settings are in the section Local Area Network (LAN) on the tab LAN IP addressA special feature is the ability to immediately specify a subnet mask and configure DHCP in the adjacent tabs of this section. Asus interface often requires a reboot to apply changes, about which the system will warn you in a separate window.

Devices MikroTik (RouterOS) offers a more complex but flexible approach. Here, the address is changed through a menu. IP -> Addresses. You need to delete the old address (or edit it) and add a new one indicating the interface (usually bridge-local or ether1). Also in MikroTik It is critically important not to forget to add the new address to the list of allowed access to services (Winbox, WebFig), otherwise access to management will be lost.

⚠️ Note: Interfaces and menu names may change with the release of new firmware versions. If you can't find the item you need, consult the manufacturer's official documentation for your specific model and firmware version.

Troubleshooting access issues after changing IP

The most common issue after changing settings is the inability to access the admin panel at the new address. The computer may be stuck in old DNS caches or have a static IP from the old subnet. First, try refreshing the page, clicking F5 Or use incognito mode in your browser. This will eliminate the cache's influence.

If this doesn't help, check the network adapter settings on your computer. They should be set to "Obtain an IP address automatically." If you have a static address, for example, 192.168.0.5, and the router moved to 192.168.5.1, there will be no connection. You will need to either change your computer's static IP to a new range or temporarily switch to automatic IP acquisition.

In extreme cases, if access is completely lost and you don't remember the new address, a hard reset is the only solution. Find the button on the case. Reset (often recessed into the case), press it with a paperclip and hold it for about 10-15 seconds until the indicators blink. The router will return to factory settings and the default IP address indicated on the sticker.

Can I use any IP address for my router?

No, you can't. Special ranges (private networks) are reserved for local networks and are not routable on the internet. These ranges are: 10.0.0.0 – 10.255.255.255, 172.16.0.0 – 172.31.255.255, and 192.168.0.0 – 192.168.255.255. Using addresses outside these ranges (for example, 8.8.8.8) will render the network inoperable.

What should I do if the new IP address is taken by another device?

An IP address conflict will occur. The network will be unstable or even unusable. Before assigning a new address to the router, it's a good idea to scan the network or simply select an address at the end of the range (e.g., .250 or .254), where the likelihood of it being occupied is minimal.

Does changing the router's IP address affect internet speed?

Changing the digital address itself doesn't affect data transfer speed. However, if you incorrectly configure the subnet mask or MTU, this can lead to packet fragmentation, resulting in a decrease in actual speed or connection interruptions.

Do I need to reconfigure port forwarding after changing my IP?

Yes, it is necessary. Port forwarding rules and DMZ settings are tied to the IP addresses of devices within the network. If the subnet changes, all these rules will become invalid and will need to be re-configured for the new client addresses.