How to set up a Rostelecom DSL-2640U router: a complete guide with photos

Router D-Link DSL-2640U — one of the most common devices that Rostelecom provides to subscribers when connecting to the Internet using technology ADSL or GPON (Depending on region). Although this model has long been discontinued, it remains in active use due to its reliability and ease of setup. However, many users experience difficulties when first connecting or after a factory reset.

In this article you will find step-by-step instructions by setting up DSL-2640U For working with Rostelecom, including internet connection, Wi-Fi setup, IPTV linking, and network security. We've covered every detail, from logging into the web interface to troubleshooting common errors. If you've never set up a router before, don't worry: the instructions are designed for beginners, but also include advanced tips for experienced users.

Preparing for setup: what you need to do before entering the control panel

Before you begin setting up, make sure you have everything you need:

• 📄 Agreement with Rostelecom — the login and password for connecting to the Internet are indicated there (usually in the “Access data” section or on a separate page).
• 🔌 Cable from the provider — connected to the port DSL (for ADSL) or LAN1 (if you have GPON with a separate ONT modem).
• 💻 Computer or laptop - It is better to use a wired connection through the port LAN on the router (Wi-Fi may not work until configured).
• ⚡ power unit — the router must be connected to the network and work stably (indicator Power (lights up green).

If you're connecting to the internet for the first time, check the connection type used in your region. For Rostelecom, this could be:

• 🔄 PPPoE (the most common option, requires entering a login/password).
• 🌐 DHCP (automatic IP acquisition, usually for GPON).
• 🔒 L2TP or PPTP (less often, mainly for corporate clients).

Not sure what type you have? Check your contract or contact Rostelecom support by phone. 8 800 100 08 00. If you have GPON (fiber optic), then the DSL-2640U is connected AS A SECONDARY router after the ONT modem - the settings will be different!

⚠️ Attention: If the router has already been used before (for example, it was bought second-hand), follow these steps: factory resetTo do this, press and hold the button Reset Press and hold the button on the back panel for 10-15 seconds until the indicators blink. After the reset, all settings (including the Wi-Fi password) will be deleted!

Login to the DSL-2640U router web interface: default login and password

To begin setup, you need to access your router's control panel. To do this:

1. Connect your computer to the router cable (port LAN on the router → PC network card).
2. Open any browser (Chrome, Firefox, Edge) and enter in the address bar:

   192.168.1.1

3. Enter your login and password to log in. Factory data:
   • Login: admin
   • Password: admin or password (try both options).

If the factory settings aren't correct, the router has been configured previously. In this case:

• 🔄 Try resetting the settings (button Reset, as described above).
• 🔍 Check the sticker on the bottom cover of the router - sometimes the password is indicated there.
• 📞 Contact Rostelecom support—they can provide login information.

After successfully logging in, you'll see the main page of the web interface. It may look different depending on your firmware version, but the main sections remain the same:

⚠️ Attention: If after entering 192.168.1.1 The page does not open, check:

• Is the cable connected to the port? LAN (Not DSL!).
• Disable VPN or proxy in your browser.
• Try a different browser or clear your cache (Ctrl+Shift+Del).

Setting up a Rostelecom Internet connection (PPPoE, DHCP, L2TP)

The most important step is setting up the internet connection itself. In most cases, Rostelecom uses the protocol PPPoE, but other options are also possible. Let's consider each of them.

1. Setting up PPPoE (the most common option)

Go to the section Setup → Internet → Manual Setup and select:

• 📡 Connection Type: PPPoE LLC or PPPoE VC-Mux (try both if it doesn't work).
• 🔑 Username: login from the Rostelecom contract (for example, 7123456789@rt.ru).
• 🔐 Password: password from the contract.
• 🔄 VPI/VCI: for Rostelecom usually 0/35 or 8/35 (check with support).

Leave the rest of the settings as default, but check:

• ✅ NAT: Enabled.
• ✅ Firewall: Enabled.
• ✅ Keep Alive: Enabled (so that the connection does not break).

Click Save and wait for the router to reboot. If the indicator Internet lights up green - connection established.

2. DHCP setup (for GPON or dynamic IP)

If you have fiber optics (GPON) with a separate ONT modem, router DSL-2640U connects to it via cable and receives an IP automatically. In this case:

1. Select Connection Type: DHCP.
2. Leave all fields blank (login/password not needed).
3. Make sure the cable from the ONT modem is connected to the port LAN1 on the router (not DSL!).

3. Configuring L2TP (less commonly used)

If the agreement specifies a protocol L2TP, enter:

• 📡 Connection Type: L2TP.
• 🔑 Username/Password: data from the contract.
• 🌐 Server IP: usually tp.internet.beeline.ru or another address (check with Rostelecom).

After saving the settings, the router will reboot. If the internet still doesn't work, check:

• 🔌 Is the cable connected correctly (to the port? DSL for ADSL or LAN1 for GPON).
• 📡 Do they match? VPI/VCI with the provider's recommendations.
• 🔄 Are there any errors in logins/passwords (case-sensitive!).

The cable is connected to the correct port|The login and password are entered correctly|The connection type (PPPoE/DHCP) is selected correctly|The router rebooted after saving the settings|The Internet indicator is green-->

Setting up Wi-Fi on the DSL-2640U: Network Name, Password, and Security

By default, Wi-Fi on the router is disabled or uses the default network name (dlink or DSL-2640U) and password. To set up your network:

1. Go to the section Wireless → Basic Settings.
2. In the field SSID Enter the name of your network (eg. MyHomeWiFi_5G).
3. Select Channel (channel). For 2.4 GHz we recommend 1, 6 or 11 - they have the least overlap with neighboring networks.
4. In the section Wireless → Security set up protection:
   • 🔒 Network Authentication: WPA2-PSK (the safest option).
   • 🔑 WPA Pre-Shared Key: Create a strong password (at least 8 characters, with numbers and letters).

Tips for choosing a password:

• 🚫 Don't use simple combinations like 12345678 or qwerty.
• 🔐 Optimal option: BigDog!2026 or WiFi@Home777.
• 📱 Write down your password in a safe place (for example, in your phone's notes).

After saving the Wi-Fi settings, the router will reboot. Connect to the new network from your phone or laptop to test the connection.

⚠️ Attention: If Wi-Fi does not work after setup, check:

• Is Wi-Fi enabled on the router (button Wireless on the body should be lit).
• Does the network name conflict with neighboring ones (use a unique name).
• Isn't there a tick? Hide SSID (if yes, the network will not be visible to devices).

How do I know which Wi-Fi channel is the least congested?

Open the app on your phone Wi-Fi Analyzer (Android) or NetSpot (iOS). It will show you the channel load in your area. Choose the one with the least overlap (for example, if everyone uses channel 6, choose 1 or 11).

Rostelecom IPTV connection (multicast setup)

If you are connected to the service interactive television Rostelecom requires additional configuration of the router for IPTV to function correctly. Otherwise, the TV or set-top box will not display channels.

Instructions for DSL-2640U:

1. Go to Advanced Setup → IGMP and turn on:
   • ✅ Enable IGMP
   • ✅ Enable IGMP Snooping

In the section Advanced Setup → VLAN Create a new VLAN for IPTV:

• 📡 VLAN ID: 100 (for Rostelecom in most regions).
• 🔗 Ports: Mark the port to which the TV or set-top box is connected (for example, LAN4).
• Save the settings and reboot the router.

After that, connect IPTV set-top box or Smart TV to the port LAN4 (or the one you specified in the VLAN settings). If the TV can't find channels, check:

• 🔌 Is the cable connected correctly (not into the port? DSL!).
• 📡 Does it match? VLAN ID with the requirements of Rostelecom (in some regions it is used 101 or 400).
• 🔄 Were the router and set-top box rebooted after the changes?

Problem	Possible cause	Solution
No picture on TV	Incorrect VLAN ID	Check your ID with Rostelecom support.
The channels are slowing down	Slow internet speed	Check your tariff or connect the cable directly to the set-top box
No sound	Problems with the codec	Update your set-top box firmware

Additional settings: security, parental controls, and firmware update

To ensure your network is not only fast but also secure, we recommend configuring a few additional settings.

1. Changing the administrator password

By default, access to the router is weakly protected. To change the password:

1. Go to Maintenance → Admin.
2. Enter the new password in the fields New Password And Confirm Password.
3. Save the changes.

2. Setting up parental controls

If you have children in your home, you can restrict access to certain websites:

1. Go to Advanced Setup → Parental Control.
2. Add a device (by MAC address) and specify a schedule or blocked sites.

3. Firmware update

Outdated firmware may cause crashes or vulnerabilities. To update:

1. Download the latest version from official D-Link website (select model DSL-2640U).
2. Go to Maintenance → Firmware Upgrade.
3. Download the firmware file and wait until it is completed (do not turn off the router!).

⚠️ Attention: Don't interrupt the update process! If the router is turned off during the firmware update, it may malfunction. Also, don't use firmware from other models—this will cause damage.

4. Setting up a guest network

If you have frequent guests, you can create a separate network with limited access:

1. Go to Wireless → Guest Zone.
2. Enable the guest network and give it a name (for example, GuestWiFi).
3. Set a password and limit the speed if necessary.

Troubleshooting the DSL-2640U

Even after proper setup, glitches may still occur. Let's look at the most common issues and their solutions.

1. No internet connection (red internet indicator)

Possible causes and solutions:

• 🔌 Cable not connected: check the connection to the port DSL (for ADSL) or LAN1 (for GPON).
• 🔑 Incorrect login details: Check your login/password in the contract or with support.
• 📡 Problems on the provider's side: Call Rostelecom and report the lack of connection.
• 🔄 Router failure: Perform a factory reset and set up again.

2. Wi-Fi works, but there is no internet

If your devices connect to Wi-Fi but pages won't open:

• 🌐 Check if the router receives an IP address from the ISP (section Status → WAN).
• 🔧 Make sure it's enabled NAT And Firewall in the connection settings.
• 📱 Restart your router and the device you are trying to use to connect to the network.

3. Slow Wi-Fi or frequent disconnections

If the speed is low or the connection is unstable:

• 📶 Change the Wi-Fi channel in the settings (section Wireless).
• 🔄 Update your router firmware.
• 📡 Check if the network is overloaded (disconnect unnecessary devices).
• 🔌 Connect critical devices (e.g. Smart TV) via cable.

4. IPTV doesn't work

If the TV does not show channels:

• 📡 Check it out VLAN ID (must comply with Rostelecom requirements).
• 🔌 Make sure the set-top box is connected to the correct port (LAN4 or another one configured for IPTV).
• 🔄 Reboot your router and set-top box.

If the problem persists, please contact Rostelecom support with a description of the error. Please also provide your router model (DSL-2640U) and connection type (ADSL/GPON).

FAQ: Frequently Asked Questions about Setting Up the DSL-2640U

🔍 How do I reset my router to factory settings if I forgot my password?

Press and hold the button Reset on the back of the router for 10-15 seconds until the indicators blink. After this, the router will reboot, and you will be able to log in with your username and password. admin/admin.

📡 How do I find out what connection type (PPPoE/DHCP) is used in my region?

Check your contract with Rostelecom or call support by phone. 8 800 100 08 00. You can also determine the connection type by the equipment: if you have fiber optics (GPON), most likely it is used DHCP.

🔒 Is it possible to turn off Wi-Fi automatically at night?

Yes, the router has this function. Wireless ScheduleGo to . Wireless → Schedule and set up a schedule (for example, turn off from 00:00 to 7:00).

📶 Why does Wi-Fi only work near the router?

Possible reasons:

• Weak signal due to obstacles (walls, furniture).
• Incorrectly selected channel (change to 1, 6 or 11).
• Outdated firmware (update it).

Solution: Try using repeater or change the location of the router (place it higher, for example, on a cabinet).

🖥️ Can the DSL-2640U be used as a signal repeater?

No, DSL-2640U Doesn't support repeater mode. To extend your Wi-Fi network, you'll need a separate repeater or mesh system.