(11) You seem to be missing the generic rule required to permit dst-nat to come through the WAN interface (port forwarding).
This new rule needs to be placed before the LAST Rule you have in the forward chain which blocks all not coming from the LAN.
add action=accept chain=forward comment="Allow Port Forwarding" connection-nat-state=dstnat \
connection-state=new in-interface-list=WAN
But you do state that this DNAT setup works fine with only 1 ISP.
Therefore, the "generic rule to permit dst-nat" must be already in place (or DNAT will not function)
So how can that be if your config does not contain it ?
EDIT : It seems you do not have ANY IPv4 firewall-rules ? (except for the generic scr-nat/masq rule to go out to Internet).
That's quite dangerous as there is no default "deny" policy !!
Somehow I secured the box by adding also the IPV4 using the rules here:
https://wiki.mikrotik.com/wiki/Manual:S ... our_Router
I've also added the IPV6 rules
I have also IPV6 enabled, because if I don't nothing works on IPV4, I don't know if this is ISP related, or if it is a problem between the keyboard and the chair :))
Anyway I am still learning, I am not a networking guru.
On interfaces status I see that on Orange WAN there's no traffic, which is kind of normal if nothing is set, but DST nat rule on port 5201 for Orange still doesn't work. I feel that I am stuck here. Somehow I feel that WAN2 is not responsive, If I ping the public IP of Orange (WAN2, ether2) from another location it doesn't answer, this doesn't apply for WAN1 (RDS) which responds to ping.
I've uploaded the new conf output.
You do not have the required permissions to view the files attached to this post.