Mikrotik router port forwarding - not accessible from web - router

Question

I need to connect to my computer via ssh through Mikrotik router having a static IP address. Router config:
[admin#MikroTik] /ip firewall nat> print
0 chain=srcnat action=masquerade out-interface=ether1-gateway
1 chain=srcnat action=masquerade out-interface=bridge-local
2 chain=dstnat action=dst-nat to-addresses=192.168.1.18 to-ports=22
protocol=tcp dst-address-type=local dst-port=23
That's how I can connect from local router's web:
ssh user#192.168.1.18 -p 22 //directly
ssh user#192.168.1.1 -p 23 //router port forwarding
ssh user#109.173.41.*** -p 23 //router's static address
But now I try to connect from some other web with the last command - and it fails with timeout exception. What's the problem? Please tell I have to provide any more information about router configuration. Thank you!
Update:
firewall rules I do have, only rules 0, 1, 3, 4 show traffic:
[admin#MikroTik] /ip firewall filter> print
0 chain=forward action=accept connection-state=established
1 chain=forward action=accept connection-state=related
2 chain=forward action=accept protocol=igmp
3 chain=input action=accept protocol=icmp
4 chain=input action=accept connection-state=established
5 chain=input action=accept connection-state=related
6 chain=input action=accept protocol=udp dst-address=224.0.0.0/4 in-interface=ether1-gateway
7 chain=forward action=accept protocol=udp dst-address=224.0.0.0/4 in-interface=ether1-gateway out-interface=wlan1
8 chain=input action=accept protocol=udp dst-port=1001
9 chain=forward action=accept protocol=udp dst-port=5500

Answer 1

Some ISPs will block traffic to services on their customer's equipment in order to prevent them from running servers.
TCP port 23 is the well-known service port for the telnet daemon.
If your ISP is blocking the port, trying a few ports over 1024 may provide the connectivity that you are looking for.