Connect two different networks IP/Port forwarding

RouterOS Beginner Basics
1

Hello, I have basic quotation I need help connecting two different networks. I attaching picture of my network setup and my code. It looks like communication working only one way and not completely. What I am missing? Why PC on each side can’t see each other? I use only port Ether2 and Ether3 no other connections or WAN.

/interface ethernet
set [ find default-name=ether1 ] disabled=yes
set [ find default-name=ether4 ] disabled=yes
set [ find default-name=ether5 ] disabled=yes
/port
set 0 name=serial0
/ip address
add address=10.70.8.188/24 interface=ether2 network=10.70.8.0
add address=192.168.1.100/24 interface=ether3 network=192.168.1.0
/ip firewall filter
add chain=input connection-state=established,related dst-address=
192.168.1.101 protocol=tcp src-address=10.70.8.188
add chain=input connection-state=established,related dst-address=10.70.8.188
protocol=tcp src-address=192.168.1.101
add chain=forward connection-state=established,related dst-address=
10.70.8.188 protocol=tcp src-address=192.168.1.101
add chain=forward connection-state=established,related dst-address=
192.168.1.101 protocol=tcp src-address=10.70.8.188
add action=drop chain=forward connection-state=established,related
add action=drop chain=input connection-state=established,related
add chain=forward connection-state=established,related
add chain=input connection-state=established,related
/ip firewall nat
add action=src-nat chain=srcnat dst-port=44000 protocol=tcp src-address=
192.168.1.101 to-addresses=10.70.8.188
add action=dst-nat chain=dstnat dst-address=10.70.8.188 dst-port=44000
protocol=tcp to-addresses=192.168.1.101 to-ports=44000
/romon port
add disabled=no

2

Try to change you src-nat rule to this

/ip firewall nat add out-interface=ether3 action=masquerade chain=srcnat

3

Thank you! It is works! One more question, how I can drop all unwanted connections and traffic and let only two IP communicate. Only 10.70.8.188 and 192.168.1.101. I want to be sure no other IP connection will be allowed. Thanks

4

I didnt read your first post cause im writing this as i type another config, but you can do it by allowing just this 2 subnets and drop everything else in ip/firewall tab.