Wi-Fi Network Cleanup: How to Remove Junk Connections and Speed ​​Up Your Internet

Is your Wi-Fi slowing down, frequently dropping connections, or connecting to unknown devices? The cause could be network clutter—a buildup of old connections, suboptimal router settings, or interference from neighboring access points. Cleaning Wi-Fi networks doesn't require specialized knowledge, but it does require a systematic approach: from removing unnecessary devices to changing channels and updating firmware.

In this article you will find step-by-step instructions for all popular brands of routers (TP-Link, ASUS, Keenetic, MikroTik), methods for diagnosing interference using mobile applications, as well as unique methods for clearing DHCP cache and ARP lists that are rarely mentioned in standard manualsAfter using these methods, connection speeds can increase by 30-70%, especially in apartment buildings with many neighboring networks.

1. Why do Wi-Fi networks need cleaning?

Every access point keeps a "log" of connected devices, even if they've been disconnected for a long time. Here are the main reasons why networks become "dirty":

• 📱 Stale DHCP LeasesThe router reserves IP addresses for devices that haven't connected in a while (for example, an old smartphone or a guest laptop). This reduces the pool of available addresses for new devices.
• 🔄 ARP cache: The IP to MAC address mapping table is populated with data even from short-term connections (for example, when a neighbor's child accidentally connects to your network).
• 📡 Interference from neighboring networksIn apartment buildings, up to 20-30 access points can operate on one channel, creating mutual interference.
• 🛡️ Security vulnerabilities: Open ports or weak passwords allow unauthorized devices to connect and consume bandwidth.

According to the study NetSpot (2026), 63% of home networks had at least 3 "dead" devices in the DHCP table, and in 18% of cases, active connections from unknown devices were found. cleaning the network every 3-6 months increases connection stability by 40-50%.

⚠️ Attention: If you live in a house with thick concrete walls (panel houses of the P-44, P-3M series), cleaning the channels may give less effect than installing Mesh systems or a repeater. Before optimizing, check the signal strength in different rooms.

2. Methods for clearing the list of connected devices

The first step is to remove all unnecessary devices from the network. This will free up IP addresses and reduce the load on the router. Instructions vary depending on the model:

2.1. Removing devices via the router's web interface

For most routers the algorithm is as follows:

1. Open your browser and enter the router's IP address (usually 192.168.0.1, 192.168.1.1 or 192.168.8.1).
2. Log in (standard login/password: admin/admin or indicated on the router sticker).
3. Go to the section with the list of devices (names may differ):
   • TP-Link: Advanced Settings → Local Network → DHCP → Client List
   • ASUS: Network Map → Clients
   • Keenetic: Devices → Device List
   • MikroTik: IP → DHCP Server → Leases

Find unknown devices (look for MAC address and the name). To check, use services like MAC Vendors Lookup.

Remove unnecessary devices with the button Remove, Delete or Release.

On some routers (for example, Zyxel Keenetic) Can block the device permanently, adding its MAC address to the blacklist (Devices → Blacklist). This is useful if your neighbors connect to your network.

2.2. Clearing DHCP and ARP Cache via the Command Line

If the router's web interface is limited, you can clear the cache manually via Telnet or SSHThis method is suitable for advanced users.

For routers based on OpenWRT or DD-WRT run the commands:

ip neigh flush all # Clear the ARP cache
killall dnsmasq # Restart the DHCP server
service dnsmasq start

For MikroTik use:

/ip dhcp-server lease remove [find]
/ip arp flush

⚠️ AttentionIncorrect use of commands can disrupt network operation. If unsure, limit clearing to the web interface.

What to do if the router does not support Telnet/SSH?

If remote access is disabled on your router, try:

1. Update the firmware (new versions often add SSH support).

2. Use alternative firmware (for example, OpenWRT for supported models).

3. Contact the manufacturer for unlocking (for corporate models).

3. Optimizing Wi-Fi Channels: How to Reduce Interference

In apartment buildings the main problem is channel blockingIf your router and five neighboring routers are all on channel 6 (2.4 GHz), your speed will drop by a factor of 3-5. The solution is to choose the least congested channel.

3.1. How to check channel load?

Use mobile apps:

• 📱 WiFi Analyzer (Android) - shows a graph of channel load in real time.
• 📱 NetSpot (iOS/Android/Windows) — creates a heat map of signals and suggests optimal channels.
• 📱 Fing — determines which devices occupy channels and their power.

Optimal settings:

• For 2.4 GHz choose channels 1, 6 or 11 (they do not intersect). Avoid intermediate ones (for example, 3 or 8), as they create interference.
• For 5 GHz use channels with numbers 36-48 or 149-165 (Not all ranges are permitted in Russia - check with your provider).

3.2. How to change the channel in a router?

Instructions for popular models:

After changing the channel Be sure to reboot your router and check the speed on your devices. If the speed hasn't improved, try a different channel in 1-2 days (your neighbors may also change their settings).

4. Cleaning the network from "garbage" traffic

"Junk" traffic is background connections that consume router resources but are not needed by the user. Sources:

• 🤖 Smart devices (lamps, sockets, cameras), which are constantly "knocking" on the manufacturer's server.
• 📱 Mobile applications, updating in the background (for example, instant messengers or cloud services).
• 🖥️ PC with torrent clients or P2P networks, even if you don't actively use them.
• 🕵️ Hidden connections from viruses or spyware on devices on the network.

4.1. How to detect and block unnecessary traffic?

Use your router's built-in tools:

1. IN TP-Link go to Advanced Settings → Traffic Statistics → Host Traffic Statistics.
2. IN ASUS open Administration → System Log → Traffic.
3. IN Keenetic use Internet → Statistics → Traffic Consumption.

If your router doesn't show detailed statistics, install the program GlassWire (Windows) or Fing (mobile) for monitoring traffic by devices.

4.2. Configuring a Firewall to Block Unnecessary Connections

In routers ASUS And Keenetic You can create firewall rules to limit traffic:

1. IN Keenetic go to Security → Firewall → Outgoing Traffic Rules.
2. Add a rule to block torrent tracker addresses or suspicious domains.
3. Example of a rule for blocking traffic to a port 6881 (often used by torrents):

   Action: Drop
   Source IP: Any
   Destination IP: Any
   Protocol: TCP/UDP
   Destination Port: 6881-6889

⚠️ AttentionBlocking ports can disrupt legitimate services (such as online games or video calls). Before adding rules, check which ports your applications use.

5. Resetting the router to factory settings: when is it necessary?

If clearing device lists and changing channels didn't help, your router might be clogged. system garbage — temporary files, incorrect settings, or corrupted firmware. In this case, hard reset (full reset).

When to do a reset:

• 🔄 The router frequently reboots or freezes.
• 📉 Speed ​​drops even when connected via cable.
• 🔒 I can't log in to the web interface (my password is reset).
• 🛠️ Errors appeared after updating the firmware.

5.1. How to reset a router correctly?

Reset methods for different models:

• 🔘 Reset button: Press and hold the button Reset (usually located on the rear panel) during 10-15 secondsuntil the indicators start flashing. Suitable for TP-Link, ASUS, D-Link.
• 🖥️ Via the web interface: IN Keenetic go to System → Configuration → Reset settings.
• 🔧 Via the command line: For MikroTik execute:

  /system reset-configuration no-defaults=yes

After reset:

1. Reconfigure your router (network name, password, encryption type) WPA3).
2. Update your firmware to the latest version.
3. Restore your settings backup (if you have one), but do not restore old device lists.

6. Additional Wi-Fi optimization methods

Besides cleaning devices and channels, there are less obvious ways to improve network performance:

6.1. Updating the router firmware

Manufacturers regularly release updates that:

• 🛡️ Close security vulnerabilities (eg. KRACK in the protocol WPA2).
• 📶 Improved channel selection algorithms.
• 🚀 Optimizes handling of multiple connections (important for smart homes).

How to update firmware:

1. Download the latest version from the manufacturer's official website (for example, for TP-Link Archer C7 This will be a file with the extension .bin).
2. In the router's web interface, find the section Software update or Firmware Upgrade.
3. Download the file and wait until it is completed (do not turn off the router!).

⚠️ Attention: Some routers (eg. Zyxel series Keenetic) support automatic updates, but they may trigger at inopportune times. We recommend disabling automatic updates and updating manually every six months.

6.2. Configuring QoS (Quality of Service)

QoS Allows you to prioritize traffic so that important data (such as video calls or games) is not slowed down by downloads.

Example of setting in ASUS RT-AX58U:

1. Go to Adaptive QoS → Internet Connection Type.
2. Select Games or Media streaming depending on priorities.
3. Please specify your tariff speed (for example, 100 Mbps).
4. Save the settings and reboot the router.

6.3. Disabling unnecessary functions

Features that are often enabled by default but rarely used:

• 📡 WPS - vulnerable to hacking, better to disable (Wireless → WPS → Disable).
• 🌐 Guest network - If you don’t use it, disable it to avoid wasting resources.
• 📶 Beamforming - Only useful for new devices, older gadgets may slow down.
• 🔄 IPv6 - If your provider does not support it, disable it. Local Area Network → IPv6.

7. How to protect Wi-Fi from future "clutter"?

To avoid cleaning your network every few months, set up preventive measures:

7.1 Automatic DHCP Clearing

In routers Keenetic And MikroTik You can set up automatic deletion of inactive devices:

• IN Keenetic: Devices → DHCP Settings → IP Lease Time (install 12 hours instead of the standard 24).
• IN MikroTik:

  /ip dhcp-server network set 0 dns-server=8.8.8.8 lease-time=12h

7.2. Controlling connections through MAC filtering

MAC filtering allows only authorized devices to connect:

1. In the router's web interface, find the section Wireless Mode → MAC Filter.
2. Add the MAC addresses of your devices (you can find them in your smartphone or PC settings).
3. Select mode Allow only specified.

The downside of this method is that you have to manually add the MAC addresses of new devices. However, it completely blocks unauthorized connections.

7.3 Regular network monitoring

Install connection monitoring applications:

• 📱 Fing (Android/iOS) — Notifies you about new devices on the network.
• 🖥️ WireShark (PC) - analyzes traffic and identifies suspicious activity.
• 🌐 GlassWire — shows which programs consume traffic.

Set up notifications on your router (if supported). For example, in ASUS there is a function Notification, which sends an email when a new device is connected.

FAQ: Frequently Asked Questions about Clearing Wi-Fi Networks

How do I know which devices are connected to my Wi-Fi?

Methods:

1. Via the router's web interface (section DHCP Clients, Connected Devices or similar).
2. Using mobile applications: Fing, WiFi Guard, NetScan.
3. Via command line (for Windows): arp -a will show all IP and MAC addresses on the local network.

If you find an unknown device, compare its MAC address with the manufacturer's database (for example, on the website MAC Vendors).

Is it possible to clear Wi-Fi from a phone without a computer?

Yes, there are several ways:

1. Use the official app from your router manufacturer (e.g. TP-Link Tether, ASUS Router).
2. Connect to the router's web interface via a mobile browser (enter the router's IP address in the address bar).
3. Install universal apps like WiFi Analyzer or NetMaster, which allow you to manage some settings.

Limitation: It's harder to work with the command line or complex settings on a phone Firewall.

What should I do if my Wi-Fi performance worsens after cleaning?

Possible causes and solutions:

• 🔄 Reset settingsIf you reset your router, make sure you have configured it correctly. SSID, password and channel.
• 📡 Wrong channel: You may have selected a congested channel. Check the load via WiFi Analyzer.
• 🛡️ IP conflict: Make sure that there are no two devices on the network with the same IP (for example, if the statically assigned IP matches the DHCP pool).
• 📶 Problems with firmwareIf you have updated your software, rolling back to the previous version may help.

If the problem persists, try connecting the device via cable. If it's still slow, the problem may be with your provider.

How do I clear my router's Wi-Fi from a provider (e.g., Rostelecom, MTS)?

Routers from ISPs often have limited functionality. Instructions:

1. Rostelecom (Sagemcom, Sercomm):
   • Entrance: 192.168.1.1, login/password - on the sticker.
   • List of devices: Local Network → DHCP → Client Table.
   • Clear: button Clear or reboot the router.

MTS (ZTE, Huawei):

• Entrance: 192.168.1.1, login admin, password mts (or on a sticker).
• List of devices: Network → LAN → DHCP Clients List.

If you don't have access to the settings, call your provider's support team and ask them to reset the device list.

Do I need to clear my Wi-Fi if I have a Mesh system (e.g. TP-Link Deco, Google Nest WiFi)?

Yes, but less frequently. In mesh systems:

• 🔄 Automatic optimization: The system itself selects the best channels and distributes devices.
• 📱 Centralized management: The list of devices is cleared through the main application (for example, TP-Link Deco or Google Home).
• 🛡️ Security: In Mesh systems, firmware is updated more frequently, which reduces the risk of "garbage".

Clear the device list every 6-12 months or if you notice any unknown connections.