MikroTik Firewall ICMP Filtering

ICMP is a very important protocol that we use in the network. It can be used to do troubleshooting or possibly to give us a message when something happens to the link as an example. However, attackers may use this protocol to crash our network devices because ICMP...

MikroTik Firewall Bridge Filter

When we were speaking about the packet flow diagram, we have seen that there is a firewall inside the bridging box, meaning that we can do firewall on the Layer 2. That’s what is called “Bridge Filter”. This can be seen clearly on Winbox when you go to the Bridge: The...

MikroTik Firewall RAW – Mitigate TCP Syn Attack

Now I have to discuss about Firewall Raw. Something you may have seen when you go to IP/Firewall on MikroTik: The question that may come to your mind: What is the Firewall Raw and what differs from the Firewall Filter Rules that we have been discussing about it in the...

MikroTik Packet Flow, Firewall Chains

The next topic that I want to speak about Packet Flow then about Firewall Chains. It is very important to understand how the packet flows inside the MikroTik RouterOS device once it enters the device. There is a lot of confusion about this topic, and I can say that...

MikroTik Stateful Firewall

MikroTik RouterOS is a stateful firewall. A stateful firewall is a kind of firewall that keeps track and monitors the state of active network connections while analyzing incoming traffic and looking for potential traffic and data risks. This firewall is situated at...

MikroTik Port Knocking

Port knocking is a technique that you can use to protect from Brute Force attacks. What it does exactly, it will knock the MikroTik router in a similar way when you go to a visit to your friend, and you knock his house’ door. In case your friend opens the door for you...