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Protect the router itself. Protect the LAN devices. Overview. We strongly suggest keeping the default firewall on. Here are a few adjustments to make it more secure. Make sure you configure additional changes when you completely understand the benefit of these particular firewall rules.
- Summary
- Chains
- Stats
- Basic Examples
Sub-menu: /ip firewall filter The firewall implements packet filtering and thereby provides security functions that are used to manage data flow to, from and through the router. Along with the Network Address Translation it serves as a tool for preventing unauthorized access to directly attached networks and the router itself as well as a filter fo...
The firewall operates by means of firewall rules. Each rule consists of two parts - the matcher which matches traffic flow against given conditions and the action which defines what to do with the matched packet. Firewall filtering rules are grouped together in chains. It allows a packet to be matched against one common criterion in one chain, and ...
/ip firewall filter print statswill show additional read-only properties By default print is equivalent to print staticand shows only static rules. To print also dynamic rules use print all. Or to print only dynamic rules use print dynamic
CLI Disctinctive
There is a bit different interpretation in each section with the similar configuration. For example, with the following configuration line you will match packets where tcp-flags does not have SYN, but has ACK flags: But with this configuration you will match all connections which state is not NEW or RELATED. Both configure similarly.
Router protection
Lets say our private network is 192.168.0.0/24 and public (WAN) interface is ether1. We will set up firewall to allow connections to router itself only from our local network and drop the rest. Also we will allow ICMP protocol on any interface so that anyone can ping your router from internet.
Customer protection
To protect the customer's network, we should check all traffic which goes through the router and block unwanted. For icmp, tcp, udp traffic we will create chains, where will be dropped all unwanted packets: Block "bogon" IP addresses Make jumps to new chains: Create tcp chain and deny some tcp ports in it: Deny udp ports in udp chain: Allow only needed icmp codes in icmp chain: other ICMP codes are found here.
23 de jun. de 2023 · Aprenda a usar o MikroTik como firewall para proteger sua rede local contra ameaças externas. Veja o passo a passo, as regras de firewall e os filtros de segurança para o seu roteador.
O Firewall Mikrotik atua como uma barreira de proteção entre sua rede local e a internet, controlando o tráfego de dados com base em regras predefinidas. Ele pode ser implementado em um roteador Mikrotik dedicado ou instalado como um aplicativo em um servidor, variando de acordo com a necessidade e os objetivos de cada empresa.
Aprenda a usar o Firewall MikroTik para proteger sua rede TCP/IP com rotinas e scripts personalizados. Veja exemplos de como negar portas, bloquear acessos FTP e evitar força bruta.