Port forward back

Hello
I am woundering why i cannot port forward back to my router.
Well lets describe i testing something and have one server TP-LINK and nothers Mikrotik.
So first static ip is conected to first TP-link router. behind this is web server lets say 192.160.1.100 and port 80 are open and all work good.
Now i have added one new router Mikrotik and is connected to this Tp-Link to LAN and adress is 192.168.1.101 (is WAN for mikrotik).
So i can see web page (if i put domain in browser) from LAN 192.168.88.1 whitch is setup on mikrotik.
But problem start when i want to see in browser different port let say port 400 (mydomain.com:400) i can see it from
first LAN 192.168.1.1 , but from second 192.168.88.1 i cannot. I have port open and work only i cannot see it on web browser.
What i must do to open this one. I have port my port open belov. Please give me any idea what i do wrong.

/ip firewall nat
add action=masquerade chain=srcnat comment=“defconf: masquerade” ipsec-policy=
out,none out-interface=ether1_WAN
add action=dst-nat chain=dstnat dst-port=400 protocol=tcp to-addresses=
192.168.88.254 to-ports=400
add action=dst-nat chain=dstnat dst-port=400 protocol=udp src-port=“”
to-addresses=192.168.88.254 to-ports=400
add action=dst-nat chain=dstnat dst-address=192.168.1.100 dst-port=400
protocol=udp src-port=“” to-addresses=192.168.88.254 to-ports=400
add action=dst-nat chain=dstnat dst-address=192.168.1.100 dst-port=400
protocol=tcp src-port=“” to-addresses=192.168.88.254 to-ports=80

Thank you guys for your help.

Look something like this for better understunding:

STATIC IP (1.1.1.1) —> LAN (192.168.0.1,), WEB SERVER LAN (192.168.0.100) ---->WAN (192.168.0.101), LAN (192.168.88.1), SERVER WITH APLICATION (192.168.88.100), MYPC(192.168.88.254)

Hi,

You just need to write this rule on your nat table to do your port forward

/ip firewall nat
ip firewall nat add chain=dstnat dst-address=public-address
dst-port=4444 action=dst-nat to-addresses=server-ip to-ports=server-port




Best Regards,