An open Wi-Fi network is like an unlocked door to your home. It can be used not only by neighbors looking to "catch a free internet connection," but also by hackers who can intercept personal data or infect devices with viruses. D-Link 2640U — a popular ADSL router model that's still used in many homes despite its age. If you've just connected this device or suddenly discovered your Wi-Fi has become "public," it's time to fix the situation immediately.
Setting a password on D-Link 2640U It takes no more than 5-7 minutes, but it requires attention to detail. In this article, we'll cover not only the basic setup steps, but also how to choose strong password, which encryption types It is better to use, and what to do if the standard address 192.168.1.1 suddenly stopped opening. And you'll also find out why WPA2-PSK It still remains the gold standard for home network security, despite the advent of WPA3.
If you've never accessed your router's admin panel before, don't worry. We'll walk you through every step in detail, including accessing the settings, selecting the correct section, and saving your changes. For a visual aid, we've included screenshots of the interface (current for the latest firmware versions). D-Link 2640U). And yes, if you have a router disk left over, you can safely throw it away: our guide is much clearer and more up-to-date!
1. Preparing for setup: what you need to do before logging into the router
Before you rush into changing settings, make sure you're prepared for the process. Here's three critical pointsthat are often overlooked:
🔹 Connection via cableAlthough you can log in to the admin panel via Wi-Fi, we strongly recommend using LAN cable, connected to one of the yellow ports on the back panel D-Link 2640UThis will eliminate the risk of sudden shutdown while saving settings.
🔹 Router power supply. Make sure the device is plugged into a power outlet and the indicator is on. Power The green (or blue, depending on the version) light is on. If the light is blinking or missing, check the power supply and cable.
🔹 Login details. By default on D-Link 2640U used:
- 🌐 Control panel address:
192.168.1.1(Sometimes192.168.0.1) - 👤 Login:
admin - 🔑 Password:
adminor an empty field (depending on the firmware)
If you have previously changed this data and forgot it, you will have to do it again reset (we will talk about this at the end of the article).
⚠️ Attention: If your router was pre-configured by your provider (e.g., Rostelecom or Beeline), the default login and password may have been changed. In this case, check the sticker on the bottom of the device or verify the details in your provider's personal account.
Also prepare new Wi-Fi passwordHe must:
- 🔐 Be long at least 8 characters (optimally – 12+)
- 🅰️ Contain uppercase and lowercase letters, numbers and special characters (
!@#$%) - 🚫 Don't match the passwords for your other accounts
- 📝 Easy to remember you (but not be obvious, like "12345678" or "qwerty")
2. Login to the D-Link 2640U admin panel
Now let's get to practice. Follow the instructions step by step:
1️⃣ Open any browser (Chrome, Firefox, Edge) on a computer or laptop connected to the router.
2️⃣ In the address bar, enter 192.168.1.1 and press Enter.
3️⃣ Wait for the authorization window to appear. Enter your username and password (default: admin/admin).
If the page does not open:
- 🔌 Check if the indicator light is on
LANon the router (signals a cable connection) - 🔄 Try a different browser or clear your cache (
Ctrl+Shift+Del) - 📡 Make sure that your computer's network connection settings are set to automatic IP acquisition (DHCP)
After successfully logging in, you'll see the main control panel page. The interface may differ slightly depending on the firmware version, but the menu structure remains similar.
⚠️ Attention: If you receive an "Incorrect Password" error after entering the correct information and resetting your password doesn't help, your provider may have blocked access to your settings. In this case, please contact technical support.
What should I do if the control panel is in a foreign language?
If the interface is displayed in English or another language, find the item in the top menu Language (or country flag) and select RussianIn older firmware versions The D-Link 2640U may not have a Russian localization. In this case, refer to the menu item locations in the screenshots in this article.
3. Step-by-step Wi-Fi password setup
Now let's move on to the main part—setting a password. Follow these instructions:
1️⃣ In the main menu, find the section Wi-Fi or Wireless (usually on the left side of the screen).
2️⃣ Go to the submenu Security settings (Security Settings).
3️⃣ In the field Network authentication (Network Authentication) select WPA2-PSK (this is the most reliable option for home networks).
4️⃣ In the field PSK encryption key (WPA Pre-Shared Key) enter the password you created earlier.
5️⃣ Click Apply (Apply) or Save (Save).
After saving, the router will reboot (this is normal). After 1-2 minutes, Wi-Fi networks will be available again, but with a password.
Encryption type selected: WPA2-PSK|
Password contains ≥12 characters|
The password is written down on paper/in the manager|
Connected devices are ready for re-authorization-->
If there is no item in the menu WPA2-PSK, but only WPA-PSK or WEP - your firmware is out of date. WEP encryption can be cracked within minutes, so its use is unacceptable. In this case:
- Update your router firmware (instructions in the next section).
- If updating is not possible, turn it on
WPA-PSK(less secure than WPA2, but better than WEP).
4. Firmware update (if there is no WPA2)
D-Link 2640U with firmware older than 2018 do not support WPA3 and may not display WPA2-PSK in the menu. If your router falls into this category, here's how to update its software:
1️⃣ Download the latest firmware from official D-Link website (select model DIR-2640U or DSL-2640U — depending on your modification).
2️⃣ Unzip the archive (usually this is a file with the extension .bin).
3️⃣ In the admin panel, go to System → Software Update (System → Firmware Update).
4️⃣ Click Review, select the downloaded file and run the update.
⚠️ Attention: Do not turn off the router or interrupt the update process! This may brick the device (may cause it to become completely inoperable). If the indicator Power blinks for more than 5 minutes - wait until it finishes or contact the service center.
| Firmware version | WPA2 support | WPA3 support | Recommendation |
|---|---|---|---|
| Until 2016 | ❌ No | ❌ No | Update is required |
| 2016–2018 | ✅ Yes | ❌ No | An update is desirable |
| 2019 and newer | ✅ Yes | ⚠️ Partially | No update required |
After updating, go to your Wi-Fi settings again and check for availability. WPA2-PSKIf the router stops turning on after updating the firmware, try resetting it to factory settings (hold down the button Reset for 10 seconds).
5. Additional security settings
Setting a password is just the first step. To make your network truly secure, we recommend taking a few more steps:
🔹 Change the administrator login and password:
- Go to
System → Administrator Password. - Come up with a new login (not
admin!) and a complex password. - Save the changes.
🔹 Disabling remote control:
- In the section
System → Remote Control(Remote Management) disable this feature. - If it is enabled, hackers can access the router from the Internet.
🔹 MAC address filtering (optional):
- IN
Wi-Fi → MAC Address FilterAdd addresses of your devices only. - This is not a panacea (MAC is easy to forge), but it will add an extra barrier.
🔹 Disabling WPS:
- WPS (Wi-Fi Protected Setup) is vulnerable to brute-force attacks.
- Find it in settings
WPSand deactivate it.
6. What to do if you forgot your Wi-Fi or router password
The situation is familiar to many: a password was set a year ago, written down on a piece of paper, which then disappears somewhere. Three ways to restore access:
🔧 Method 1: View the password on the connected device
- 🖥️ On Windows: Open
Control Panel → Network and Internet → Network and Sharing Center → Change adapter settingsRight-click on your Wi-Fi network and selectStatus → Wireless Network Properties → Securityand check the boxShow entered characters. - 📱 On Android: Install the application WiFi Password Viewer (root rights required) or look at the password in the router settings (if you have access).
🔄 Method 2: Reset the router to factory settings
- Press and hold the button
Reseton the back panel D-Link 2640U (10–15 seconds). - After rebooting, log in to the control panel at the address
192.168.1.1with login/passwordadmin/admin. - Set up Wi-Fi again (instructions above).
⚠️ Attention: Reset will delete all settings, including internet connection settings (PPPoE, L2TP, etc.). If these were configured by your ISP, the internet may not work after the reset. In this case, contact support or check your connection details in your personal account.
📞 Method 3: Call your provider
If your router was provided by a provider (for example, Rostelecom or MTS), its settings may have been tied to your contract. In this case:
- Call technical support.
- What is the router model?D-Link 2640U) and ask to reset your password or remind you of your login details.
7. Common mistakes and their solutions
Even when following the instructions, problems can arise. Let's look at the most common ones:
🚫 Error: "Incorrect password" when connecting to Wi-Fi
- Please check the case of your characters (the password is case sensitive).
- Make sure you are connecting to the correct network (your neighbors may have a similar name for their network).
- Reboot your router (turn off the power for 30 seconds).
🚫 Error: Settings are not saved in the admin panel.
- Try a different browser (Firefox or Edge often work more stably Chrome).
- Clear your browser cache or use incognito mode.
- Check if your antivirus is blocking access to the router.
🚫 Error: After updating the firmware, the router does not turn on.
- Turn off the power for 1 minute, then turn it on again.
- If the indicators are not lit, check the power supply.
- If the router is bricked, it needs to be reflashed
TFTP(it is better to contact the service).
🚫 Error: Slow internet after changing password
- It's a coincidence—the password doesn't affect speed. Check your network load (perhaps someone is downloading torrents).
- Reboot your router and test the speed on Speedtest.
FAQ: Answers to Frequently Asked Questions
Is it possible to set a password for Wi-Fi via phone?
Yes, but it's less convenient. You'll need:
- Connect to the router via cable through an OTG adapter (or via Wi-Fi if the network is open).
- Open the browser on your phone and enter
192.168.1.1. - Follow the same steps as on a PC (the interface will not be adaptive, but it will work).
For Android There are also apps like WiFi Router Settings, but they do not work with all models.
What password is impossible to hack?
There are no 100% invulnerable passwords, but the most reliable ones are:
- Length ≥16 characters.
- Contain a random combination of letters (different registers), numbers and special characters.
- Are not a word or phrase (e.g.,
MyDogName2026!easier to hack than7#pL9!kQ2$vR5*).
Use password generators or method wild phrases (For example, Cow! Flies@Over.The.Ocean31).
Do I need to change the SSID (network name)?
Preferably. A standard name like dlink-1234 Reveals the router model, making it easier for hackers to prepare an attack. SSID rules:
- Do not use personal information (last name, address).
- Don't name the network too provocatively (e.g.
FBI_Surveillance_Van- It's fun, but it can attract unwanted attention). - You can hide the SSID in the settings (
Hide access point), but this will create inconvenience for guests.
How do I check who is connected to my Wi-Fi?
There are two ways:
Method 1. Via the router control panel:
- Go to
192.168.1.1. - Go to
Wi-Fi → ClientsorDHCP → Client Table. - View the list of connected devices (displayed by MAC addresses and IP).
Method 2. Via mobile apps:
Install Fing (Android/iOS) or WiFi GuardThey scan the network and show all devices, including unknown ones.
Can I use WPA3 on D-Link 2640U?
No. D-Link 2640U — an outdated model (discontinued in 2018), and its hardware platform does not support WPA3The maximum you can use is WPA2-PSK with a strong password. If security is critical (for example, for an office), consider purchasing a new router with WPA3 support (for example, D-Link DIR-825 or TP-Link Archer AX20).