Using Mikrotik Router for Routing only, without NAT

RouterOS Beginner Basics
1

Dear all

Attached I show you a network schemata for the connection to the Internet-Link. Can
you provide me a step-by-step configuration, so that I can turn the RouterBoard into
the needed Mode without doing a NAT, only Routing between the ISP and the Firewall as
shown in the network schemata?

Kind regards, David

2

Here you can find step by step example how to use simple static routing
http://wiki.mikrotik.com/wiki/Manual:Simple_Static_Routing

3

Honestly, if you were to just wipe the entire configuration, and then put dhcp client on ether1, and 83.150.52.17/28 on ether2 - no bridges, no switch master/slave, then this would completely do what you want. (DHCP will set the default GW for you)

Then for security, I would make the filter input chain look like this:
action=accept connection-state=established,related
action=accept in-interface=ether2
action=drop

Since there’s a firewall behind the Mikrotik, you don’t need any forward filter rules at all.

4

Hi ZeroByte

Thanks!

wipe the entire configuration

do you mean to reset to factory defaults? Or do I have to make a remove of all configurations? How should I do that? Can I access the device anymore?

Dave

5

From the GUI, if you go to System / Reset Configuration, check No Default, then it will wipe it. Then you can use Winbox and connect to it via it’s MAC address.

6

Do I have to add routes also? Even if I don’t know the GW on the DHCP Side of the Router?

7

Do I have to add routes also? Even if I don’t know the GW on the DHCP Side of the Router?



DHCP will set the default GW for you

You dont have to set routes on the wan side because its coming from the dhcp client on your wan side.


if you look at the mikrotik with winbox under ip routes you will see the dynamic routes entries