How to block an IP address on a router

Question

I’ve noticed suspicious activity on my network and want to block a specific IP address directly through my router. I’m unsure where to find the necessary settings or how to implement this block effectively. Can someone explain the process step by step?

Answer 1

Since router interfaces vary by model and manufacturer, I'll provide a general, step-by-step guide that should apply to most routers. If you're still unsure, consult your router's user manual or manufacturer's support website for specific instructions.

Before You Begin

1. Identify the IP address to block: Ensure you have the correct IP address you want to block. You can find suspicious IP addresses in your router's:
   • Logs (usually under "System Logs," "Security Logs," or "Firewall Logs")
   • Connected Devices list (if the suspicious device is currently connected)
2. Understand the IP address type: Note whether the IP address is:
   • Internal (Private): 192.168.x.x, 10.x.x.x, or 172.16.x.x (within your network)
   • External (Public): A unique global address (e.g., 203.0.113.123)

Blocking an IP Address on Your Router

For External (Public) IP Addresses

1. Access your router's web interface:
   • Open a web browser (e.g., Google Chrome, Mozilla Firefox)
   • Type your router's IP address in the address bar (common addresses are 192.168.0.1, 192.168.1.1, or 10.0.0.1)
   • Log in with your admin credentials (username and password)
2. Navigate to the Firewall or Security section:
   • Look for sections like "Firewall," "Security," "Access Control," or "IP Filtering"
   • This might be under "Advanced Setup" or "Settings"
3. Find the IP Blocking or Filtering feature:
   • Sections might be labeled "IP Blocking," "IP Filtering," "Blocked IP Addresses," or "Access Restrictions"
4. Add the IP address to block:
   • Click "Add" or "New Rule"
   • Enter the external IP address you want to block
   • Choose a protocol (e.g., "Any," "TCP," "UDP," or "Both")
   • Set the port range (e.g., "All" or specific ports if known)
   • Select Block or Deny as the action
   • Save or Apply the changes

For Internal (Private) IP Addresses

Note: Blocking internal IP addresses is more about controlling device access within your network.

1. Follow steps 1-2 above to access your router's web interface and navigate to the relevant section.
2. Look for Device Management or Access Control features:
   • Sections might include "Device Management," "Access Control," "Client Management," or "Local IP Filtering"
3. Find the specific device or enter the internal IP address:
   • If the device is listed, select it and choose to Block or Restrict Access
   • Alternatively, add a new rule with the internal IP address, choosing the desired block or restriction settings
4. Save or Apply the changes