Cannot access CWP via public IP / domain in LAN

Hi, we searched all the topics here & on Google but none fits our situation

We installed CWP on CentOS on a Proxmox VM (103) and followed this guide to open the necessary ports as follows
http://wiki.centos-webpanel.com/centos-mostly-used-ports




With the following settings on the physical NAT







With the above, our LAN users  cannot access public URLs :



https://PublicIP:2031 (CWP main panel)

https://domainname:2083 (CWP user panel)

https://myweb.site (User-created website)


It shows ERR_CONNECTION_TIMED_OUT



While internal URLs work fine

https://192.168.100.95:2083 (CWP panel)




However, users outside of the network are able to access public URLs


https://PublicIP:2031 (CWP main panel)

https://domainname:2083 (CWP user panel)

https://myweb.site (User-created website)





Now we can't figure out what else we are missing to check to allow LAN users to access our CWP via public IP or domain names

Cannot access CWP via public IP / domain in LAN
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Cannot access CWP via public IP <--- check your firewall, routing and using public IP.IP.IP.IP
try it from device are outside your network....

domain in LAN <--- check your hosts....resolve conf (you can add manual )

Does your router support loopback / NAT hairpin?