🔐 MikroTik Firewall Filter Rules Explained | Secure Your Router Against Attacks

Описание: 🔐 MikroTik Firewall Filter Rules Explained | Secure Your Router Against Attacks

In this video, we dive deep into MikroTik RouterOS firewall filter rules and show you how to secure your router and network using a clean, effective, and real-world firewall configuration.

You’ll learn how to:

✅ Block invalid connections on input and forward chains

✅ Allow only established and related traffic

✅ Safely enable ICMP (ping) for monitoring

🚫 Detect and block port scanners automatically

🔒 Completely block WAN access to the router

🌐 Allow LAN to WAN internet access only

🛑 Drop all other unauthorized traffic

This setup is ideal for:

Home networks 🏠

Small offices 🏢

ISP edge routers 🌍

Anyone looking to harden MikroTik security

🔧 Firewall Rules Covered in This Video

Input chain protection (router security)

Forward chain filtering (LAN ↔ WAN traffic)

Port scan detection using PSD

Address lists for automated blocking

Best practices for WAN interface protection

🚀 Why This Firewall Configuration Matters

Without proper firewall rules, your MikroTik router is exposed to:

Brute-force attacks

Port scanning

Unauthorized WAN access

Malicious traffic

This video helps you understand every rule, not just copy-paste it.

📌 Firewall Filter Rules in the video

/ip firewall filter
add action=drop chain=input comment="Drop invalid input" connection-state=invalid
add action=accept chain=input comment="Allow established input" connection-state=established,related
add action=accept chain=input comment="Allow ICMP (Ping)" protocol=icmp

add action=add-src-to-address-list address-list=port_scanners address-list-timeout=1d chain=input comment="Detect port scans" protocol=tcp psd=21,3s,3,1
add action=drop chain=input comment="Drop port scanners" src-address-list=port_scanners
add action=drop chain=input comment="Drop all WAN access to router" in-interface=ether1

add action=drop chain=forward comment="Drop invalid forward" connection-state=invalid
add action=accept chain=forward comment="Allow established forward" connection-state=established,related
add action=accept chain=forward comment="LAN to WAN" out-interface=ether1 src-address=10.1.0.0/16
add action=drop chain=forward comment="Drop everything else forward"


👍 If you found this helpful, like the video, subscribe, and share it with other MikroTik users.
💬 Questions or improvements? Drop them in the comments!





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#MikroTik #RouterOS #MikroTikSecurity