Explanation of Mikrotik Chain: Input, Forward, Prerouting

Differences and explanations Chain Mikrotik Input, Output, Forward, Prerouting, and Postrouting will be discussed in the article in the following blog Techsoftcenter.

Forward

– Used to process data packets through routers, connections that occur from the public to local
or
– The connection that occurs from local to public
with the provision that there is no process inside the router, it means that the connection is direct and only passing in the router does not happen a process inside the router.

Input

– Used to process packets entering the router through one of the interfaces with the destination IP address which is one of the router addresses. Chain input is useful for limiting the configuration access to Mikrotik Router.
or
– The connection that occurs from local to router and ends in router
example: use of the internal proxy (internal proxy right in the router)

Output

– Used to process data packets originating from the router and left through one of the interfaces, connections that occur from the router to the public.
or
– The connection from the router to the local.
means the connection is created because the router itself is requesting (the router needs it, not from local/public), for example, the result of internal proxy Mikrotik sent to the client.

Prerouting

Pre-routing means that the connection will enter the router (no matter from where / depends on the settings mangle in interface later)
this connection will be in the process inside the router, can the process of bending to the external proxy, can filtering port, can anything, anyway there is a process, prerouting it marks the connection before the process occurs.

Postrouting

Postrouting is a connection that will exit the router after a process occurs inside the router.

Such is the article about Chain Mikrotik Input, Output, Forward, Prerouting, and Postrouting. Maybe useful 🙂