Many users face a situation when a second router appears in the house, for example, the popular D-Link DIR-300, which is gathering dust on a shelf or is used only as a switch. Instead of throwing away an obsolete device, it can be effectively revived, turning it into a fully functional WiFi hotspotThis solution is ideal for extending wireless coverage in a large house or apartment with thick walls, where the main router's signal doesn't reach distant rooms.
Using an old router in Access Point mode allows you to create a single, seamless network to which devices will connect automatically as they move. Unlike repeater mode, a wired connection between the main router and the DIR-300 ensures maximum stability and speed, eliminating the packet loss typical of wireless extensions. The key here is to change the IP address correctly and disable the DHCP function on the device being configured., which prevents conflicts in the local network.
In this article, we'll cover the interface setup process, physical connections, and the nuances of working with different firmware versions in detail. You'll learn how to avoid common mistakes beginners encounter when trying to connect two network devices. A willingness to experiment and an Ethernet cable are all you need to get started.
Preparing equipment and selecting a connection diagram
Before you begin working on the software, you need to properly prepare the physical infrastructure. You'll need a primary router that already distributes internet, and D-Link DIR-300, which will operate in access point mode. It's important to understand that for stable operation, the WAN port on the second device will most likely not be used, and all LAN ports will become equal ports on the switch.
First, reset the DIR-300 to factory settings. This is a critical step, as old configurations may contain static IP addresses or filtering rules that will prevent it from functioning properly in its new role. To reset, locate the recessed button on the rear panel. Reset, press it with a paper clip for 10-15 seconds with the power on and wait for the indicators to reboot.
After the reset, connect your computer to any of the DIR-300's yellow LAN ports using a network cable. Make sure your PC's network card is set to obtain an IP address automatically (TCP/IP version 4). You're now ready to log in to the device's web interface for initial setup.
☑️ Preparing to set up an access point
Initial IP address setup and web interface login
By default routers D-Link have an IP address 192.168.0.1However, if your main router also uses this range (which happens in 90% of cases), an address conflict will occur, and you won't be able to access the internet or configure settings. Therefore, the first step should always be to change the IP address of the DIR-300 itself.
Open your browser and enter the default URL in the address bar. If the page doesn't load, check the address assigned to your network card or try resetting it again. After logging in (default login) admin, the password field is often left blank or also written admin) immediately go to the local network settings section.
You need to change the DIR-300's IP address to an address that is in the main router's subnet but does not overlap with its DHCP pool. For example, if the main router has the address 192.168.1.1, then the DIR-300 can be assigned an address 192.168.1.250Leave the subnet mask as default. 255.255.255.0After applying the settings, the router will reboot, and you will need to log in to the interface using the new address.
What to do if you forgot your new IP address?
If you've changed your IP address and forgotten it, the only way to regain access is to perform a full reset using the Reset button. All settings, including the WiFi name and password, will be deleted, so write down your changes immediately.
Disabling the DHCP Server: A Critical Step
The most common mistake when creating an access point is leaving the DHCP server enabled on the second device. There should only be one address server on the network, and that's your primary router. If DHCP remains enabled on the DIR-300, connected devices will receive incorrect gateway and DNS settings, resulting in internet inaccessibility.
To disable this function, find the section in the menu that is responsible for local network or LAN SettingsDepending on the firmware version, this option may have a different name. You need to find a checkbox or a switch labeled Enable DHCP Server and remove it. After that, be sure to save the changes by clicking the button Save or Apply.
⚠️ Caution: After disabling the DHCP server and changing the IP address, your computer may lose connection to the router if it had a static IP address. Make sure your PC is set to receive settings automatically so that the primary router provides the correct parameters.
Your DIR-300 has now become a transparent bridge. It will forward all IP address requests to the main router. This ensures that all devices in the home, whether connected to the primary or secondary router, are on the same subnet and can see each other (printers, NAS, media servers).
Setting up a wireless WiFi network
Setting up wireless mode on the DIR-300 is almost identical to setting up any regular router, except that we are not setting up a connection to the ISP (PPPoE, L2TP, etc.) here. Go to the section Wireless or WiFi and select manual setup.
Set the network name (SSID). Here you have two options: make the name identical to your main router to create a pseudo-roaming network, or create a unique name to clearly identify which access point you're connected to. For home use, a unique name with "_Ext" or "_Room" appended is often chosen to avoid confusion.
In the security section, be sure to select the encryption type WPA2-PSK (or WPA3, if the device supports it and the clients are compatible). Using legacy WEP or an open network is unacceptable, as it compromises all traffic. Create a complex password consisting of letters and numbers.
It's also recommended to manually select your wireless network channel, especially if you live in an apartment building. Use WiFi analyzer apps on your smartphone to find the least crowded channel (usually 1, 6, or 11 in the 2.4 GHz band) and lock it in your settings to avoid interference from neighbors.
Physical connection and operation check
Once the software setup is complete, it's time to properly connect the devices with cables. Take a patch cord and plug one end into any available cable. LAN port the main router, and the other end - in any LAN port DIR-300. The WAN port (Internet) on the DIR-300 in this diagram remains empty!
This type of connection (LAN-to-LAN) turns the router into a Wi-Fi switch. If you connect a cable to the WAN port, the device will attempt to create a separate subnet, resulting in double NAT and problems accessing local resources. Make sure the LAN indicators on both devices are lit or blinking.
To test, connect your smartphone or laptop to the created WiFi network. The device should receive an IP address from the main router (check in the connection properties). Try accessing the internet and, importantly, test access to local network resources, such as a network folder or printer connected to the main router.
Comparison of operating modes and characteristics table
Users often confuse network equipment operating modes. Understanding the difference between router, access point, and repeater modes will help avoid future mistakes. The DIR-300 is a router out of the box, but we've programmed it into access point mode.
Below is a table showing the differences in functionality for different device usage scenarios:
| Parameter | Router Mode (Default) | Access Point (AP) mode | Repeater Mode |
|---|---|---|---|
| Using the WAN port | Yes (for the Internet) | No | No (wireless) |
| DHCP Server | On | Turned off | Turned off |
| Creating a subnet | Yes (NAT) | No (single network) | No (single network) |
| Transfer speed | 100/300 Mbps | 100/300 Mbps | Reduced by 50% |
As you can see from the table, the access point mode we configured is the most effective for wired network extension. It doesn't create layers of address translation and doesn't reduce wireless speeds like a repeater does.
Possible problems and solutions
Despite the ease of setup, technical difficulties can sometimes arise. One common issue is a "loopy reboot" or an inability to save settings. This may indicate a faulty DIR-300 power supply, which may have lost capacity over the years.
Another common scenario is when a device is accessible via WiFi, but there's no internet connection. In this case, check the cable between the routers. It should be intact and terminated according to the T568B standard. Also, make sure that MAC address filtering isn't enabled on the primary router, which could block the new device.
⚠️ Note: D-Link firmware interfaces may vary depending on the hardware revision (NRU, A, B, etc.). If you don't see the described points, look for similar versions, as the operating logic remains the same for all models.
If the DIR-300 stops responding after setup, try holding the Reset button for 30 seconds while the power is on. This initiates an emergency reset, which often helps restore access even if the firmware is corrupted.
Can DIR-300 be used for IPTV?
In access point mode (LAN-to-LAN), the IGMP Proxy function often doesn't work correctly or is missing. For full IPTV support, it's better to leave the DIR-300 in router mode and configure a static route, but this requires more in-depth network knowledge.
Optimization and additional settings
Once the network has been successfully launched, it's worth considering additional settings to improve stability. In the WiFi settings, it's recommended to set the signal strength to 100% or 75% if the access point is close to clients to reduce noise levels. You can also change the wireless network mode to 802.11 N only or Mixed, disabling legacy modes B and G, unless you have very old devices.
Don't forget to update your device's firmware if the manufacturer is still releasing security updates for your model. Although the DIR-300 is not a new device, patches may address vulnerabilities in encryption protocols. You can check the firmware version in the section System or Administration.
Properly configuring the DIR-300 as an access point allows you to breathe new life into old hardware and significantly improve connection quality in your home without purchasing expensive mesh systems. It's a cost-effective and reliable solution for most use cases.
FAQ: Frequently Asked Questions
Can the DIR-300 WAN port be used in access point mode?
In the standard out-of-the-box setup, no, the WAN port is not used in bridged (LAN-to-LAN) mode. However, in some modified firmware versions (for example, DD-WRT or OpenWRT, if supported by a specific revision), you can reassign ports. In stock D-Link firmware, use only LAN ports.
Why did the internet disappear on all devices after setup?
You most likely forgot to disable the DHCP server on the DIR-300 or connected a cable to the WAN port. In the first case, devices receive the wrong gateway; in the second, a network conflict occurs. Check these two settings first.
Will devices see the printer connected to the main router?
Yes, with proper configuration (access point mode, LAN-to-LAN connection, DHCP disabled), all devices are on the same local subnet. A computer connected to the DIR-300 will "see" the printer connected to the main router as if they were connected to the same switch.
How do I return the DIR-300 to normal router mode?
To do this, simply perform a full reset using the Reset button. After this, the device will return to factory settings, and the IP address will be 192.168.0.1, and the DHCP server will be enabled. You'll need to reconfigure your connection to your ISP using the quick setup wizard.