No internet connection in DMZ

RouterOS Beginner Basics
1

Hi, I’m just bought my first MikroTik and I’m beginner user.
I’ve some problem with first configuration.
This is my LAN:

Thomson modem/router with DMZ to MikroTik.
Thomson have DHCP active (192.168.1.0); dinamic public IP released by ISP.
Machines connected to Thomson can go to internet.

Mikrotik connect to Thomson with eth1.
Home AP quick start with DHCP and firewall active (192.168.88.0).
I can see public IP released by ISP in main page of Winbox.
Machines connected to Mikrotik can’t get internet.
I can see rx/tx traffic in bridge and eth2 interfaces. No traffic in eth1.
Ping test to external IP website shown: “no route to host”.
Default NAT rule shown “ISP gateway unreachable”.

Please help me!
I’m getting crazy!

Thanks.
Davide

2

If you already have a router, why would you like to have another (mikrotik) behind the first one?
If you would like to use a mikrotik instead of the router provided by your internet provider, the best way is to put the one you already have in bridge mode and then set your mikrotik as ppoe client and everything else you need.

Your problem is that your thomson does not have a route to the private network behind mikrotik. To solve the problem you have to add the route on thomson, or set a NAT on mikrotik, but neither is better than first solution (thomson in bridge mode)

regards

3

Thanks sataman for your reply!
First of all I would bypass modem because Mikrotik is more configurable in case of home servers and port forwarding, than a commercial modem like Thomson.

Thanks to your reply I discovered that Thomson can’t set in bridge mode (probabily forced by my ISP).
Than I try to set configuration with a Zyxel.
I’m following this guide:

http://www.akadia.com/services/zyxel_transparent_mode.html

… and I would set it in transparent mode to avoid to set PPPoE on Mikrotik.
My dubt now is that this is no possible with dinamyc IP supplied by my ISP…

At the end of guide I read tasks to do on Mikrotik:

  1. Setup IP-Address on Public Interface to 83.251.44.194 / 255.255.255.240
  2. Setup Default Gateway to 83.251.44.193

… I think I can’t do it because I have dinamyc IP by ISP…
or I wrong?

Can you advice me more…?

4

…again, why would you want to avoid PPPoE on MTik??

It works nice.

  1. put your thomson router in bridge mode (if your ISP manages the router - ask them to do it because on the next reset it will be back in router mode)
  2. create PPPoE interface (you have to have username and password (ask your ISP) and after connection is established you will automatically get a dns and default route…
    3.create NAT
    Assuming that you have already configured the “private side” (IP address, DHCP…) you are on Internet !!

Everything else you would like to add is just a cherry on the cake…

regards