What is forward chain in MikroTik?

The forward chain is for all packets going through the router – being forwarded to a public IP either inside or outside of the router. In a server environment, the forward chain is therefore what you use the most.

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What is bridge configuration?

Bridging is a feature that can be used to connect two or more Layer 2 interfaces together to form a single broadcast domain. Bridging forwards packets in software, based on the Layer 2 header. This is similar forwarding logic to Layer 2 switching, which forwards packets in hardware.

How does MikroTik firewall work?

MikroTik RouterOS Firewall is based on Stateful Filterig technology that can be used to detect and block many stealth scans, DoS attacks, SYN floods. Network communication is made up of small chunks of data called packets, and several of these packets are used solely to create, maintain, and finish the connection.

What is input chain?

The INPUT chain is used for any packet coming into the system. The OUTPUT chain is for any packet leaving the system. And the FORWARD chain is for packets that are forwarded (routed) through the system.

Are MikroTik routers secure?

As many as 300,000 routers made by Latvia-based MikroTik are vulnerable to remote attacks that can surreptitiously corral the devices into botnets that steal sensitive user data and participate in Internet-crippling DDoS attacks, researchers said.

What are bridge ports?

Bridge interfaces connect two different interfaces (bridge ports). Bridging two interfaces causes every Ethernet frame that is received on one bridge port to be transmitted to the other port. Thus, the two bridge ports participate in the same Broadcast domain (different from router port behavior).

Is MikroTik router a firewall?

What is the importance of Nat in MikroTik network?

Along with the Network Address Translation (NAT), it serves as a tool for preventing unauthorized access to directly attached networks and the router itself as well as a filter for outgoing traffic.

What is the difference between the chain input output and forward?

What is Postrouting and Prerouting?

And here’s when the different chains do their thing: PREROUTING: Immediately after being received by an interface. POSTROUTING: Right before leaving an interface. INPUT: Right before being handed to a local process.

How can I make MikroTik more secure?

MikroTik routers require password configuration, we suggest using a password generator tool to create secure and non-repeating passwords.

What is Bridge VLAN filtering configuration?

Bridge VLAN Filtering configuration is highly recommended to comply with STP (IEEE 802.1D), RSTP (IEEE 802.1W) standards, and is mandatory to enable MSTP (IEEE 802.1s) support in RouterOS. The main VLAN setting is vlan-filtering which globally controls VLAN-awareness and VLAN tag processing in the bridge.

How do I use bridge firewall with IP firewall?

You can put packet marks in bridge firewall (filter and NAT), which are the same as the packet marks in IP firewall put by ‘/ip firewall mangle’. In this way, packet marks put by bridge firewall can be used in ‘IP firewall’, and vice versa. General bridge firewall properties are described in this section.

How do I add a VLAN interface to a bridge?

/ip address add address=192.168.99.1/24 interface=bridge1 In case VLAN filtering will not be used and access with tagged traffic is desired, create a routable VLAN interface on the bridge and add an IP address on the VLAN interface. /interface vlan add interface=bridge1 name=MGMT vlan-id=99 /ip address add address=192.168.99.1/24 interface=MGMT

How do I prevent bridging loops in MSTI?

Use split horizon bridging to prevent bridging loops. Set the same value for group of ports, to prevent them from sending data to ports with the same horizon value. Split horizon is a software feature that disables hardware offloading. Read more about Bridge split horizon. Path cost to the interface for MSTI0 inside a region.