Opening 8883 port for MQTT running on gl-mt300a

Installing and Using OpenWrt
#1

Warm greetings. I have version 19.07.2 r10947-65030d81f3 on GL-MT300A router. I have a wireless client configuration that connects the router to another wireless router on wan side. I have installed Mosquitto running on port 8883 and clients on lan are able to connect to mosquitto without any problem. I am trying to open port 8883 on wan so that upstream clients can connect to mosquitto. I have tried using the following configuration without any success.

config rule
option target 'ACCEPT'
option src 'wan'
option proto 'tcp'
option dest_port '8883'
option name 'ACCEPT-MQTT'
option enabled '1'

I have been struggling for past few days without any success. I have no knowledge of firewalls or networking. I really appreciate any help or pointers to resolve the issue.

Best regards.

#2 
netstat -lnp | grep mosquitto
cat /etc/mosquitto/mosquitto.conf | grep -v '^#' | grep -E '(bind|listen)'
#3

root@MYIOTGW83:~# netstat -lnp | grep mosquitto cat /etc/mosquitto/mosquitto.con
f | grep -v '^#' | grep -E '(bind|listen)'
grep: cat: No such file or directory
/etc/mosquitto/mosquitto.conf:# multiple times, mosquitto can listen on more than one port. If
/etc/mosquitto/mosquitto.conf:# this case, mosquitto will attempt to bind the listener to that
/etc/mosquitto/mosquitto.conf:# interface. By default, mosquitto will listen on all interfaces.

#4

does the wifi network you connect to have client isolation enabled by any chance?

#6

The upstream router is identical device with fresh install of openwrt. where do I look for client isolation settings?

#7

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