Hi, is there a way to access to more than one routerboard with winbox when I've some many RB under a xDSL router?

This is my scenario:

Public IP --> xDSL router -->
RB 1 10.10.0.10/24
RB 2 10.10.0.11/24
RB 3 10.10.0.12/24
etc.

To work on RB I have to set the NAT on the xDSL router to an address inside the LAN on port 8291, a setting for each of the RB.

Can RB works with different ports somenthing like this:

Public IP --> xDSL router -->
RB 1 10.10.0.10/24 NAT 10.10.0.10:8291
RB 2 10.10.0.11/24 NAT 10.10.0.10:8292
RB 3 10.10.0.12/24 NAT 10.10.0.10:8293
etc.

Some ideas?
Cetalfio

Ok I want share with you my simple solution:

Public IP --> xDSL router -->
RB 1 10.10.0.10/24 NAT 10.10.0.10 external and internal port 8291
RB 2 10.10.0.11/24 NAT 10.10.0.10 external and internal port 8292
RB 3 10.10.0.12/24 NAT 10.10.0.10 external and internal port 8293

change default tcp port of winbox service to RB2 and RB3

/ip service print

0 telnet 23 0.0.0.0/0
1 ftp 21 0.0.0.0/0
2 www 80 0.0.0.0/0
3 ssh 22 0.0.0.0/0
4 X www-ssl 443 0.0.0.0/0 none
5 X api 8728 0.0.0.0/0
6 winbox 8291 0.0.0.0/0

/ip service set 6 port=8292

now with winbox I can access with:
pubblic IP:port
ex.
RB1: 217.122.1.18:8291
RB2: 217.122.1.18:8292
RB3: 217.122.1.18:8293

You don't have to change the winbox ports, look at this:

/ip firewall nat
add action=masquerade chain=srcnat comment="" disabled=no out-interface=\
bridge1 src-address=10.52.71.0/24
add action=dst-nat chain=dstnat comment="steve casco rootenna" disabled=no \
dst-address=x.y.z.248 dst-port=56732 protocol=tcp to-addresses=\
10.52.71.187 to-ports=8291
add action=dst-nat chain=dstnat comment="edgar casco rootenna" disabled=no \
dst-address=x.y.z.248 dst-port=56734 protocol=tcp to-addresses=\
10.52.71.147 to-ports=8291

what RK has posted will work on the mikrotik you are using as a gateway. It seems you are using the DSL as your gateway.

Your solution is very simple and does not require firewall rules. However.... I would suggest you put your DSL modem into bridge mode and put one of your RB's in the NAT postion if possible. You will have MUCH more control.