Basic Set Up

RouterOS Beginner Basics
1

Hi All,

I have just purchased my first RouterBoard. I have a RouterBoard RB750 and intend using it to replace an IPCOP firewall.

The configuration options are endless and syntax a bit different to what I am used to. I have searched the forums and I think my search terms are failing me as I am sure this has been answered before, also cant find this example in the wiki as I assume it may be a bit to simple to list.

My question is:
I have a Cisco router with a public IP and ipcop firewall configured with 5 sequential IP addresses after the cisco and all traffic is passed form the cisco router to the ipcop box and all traffic is routed from ipcop to the cisco router from the interal LAN.

So the routerboard will sit between my lan and cisco wan router. I cannot get to grips with the terminology fast enough as I have a failing drive in my ipcop box and in the interim while I get skilled up I was hoping someone had a mini how to or could give me some pointers as to how.what direction to take.

scenario at resent:
cisco ip = 41.1.1.1 (Masked)
ipcop 1 = 41.1.1.2
ipcop 2 = 41.1.1.3
ipcop 3 = 41.1.1.4
ipcop 4 = 41.1.1.5
ipcop 5 = 41.1.1.6

ipcop LAN interface = 192.168.0.254
LAN address 102.168.0.0/24

Your help will be immensely appreciated.

Bash

2

There are pieces missing in your description. If Cisco is acting as router it should have another IP on the internal
interface, the one that connects to ipcop.
Anyway, to configure RB750 (assuming IP of external interface is 1.1.1.2/24 and gateway 1.1.1.1):

/ip address
add address=1.1.1.2/24 interface=ether1
add address=192.168.0.254/24 interface=ether2
/ip firewall nat
add chain=srcnat action=masquerade
/ip route
add dst-address=0.0.0.0/0 gateway=1.1.1.1

Connect the ether1 with Cisco router and ether2 with your LAN.
I would have preferred to have one router though, instead of two (Cisco + RB750), it is not
good to do double NAT.