If you have created a 1:1 NAT or Port Forwarding entry and it does not have the expected effect, then there are several possible causes:

• You may have misconfigured the NAT entry
• The NAT entry may be configured correctly, but something else necessary for NAT to work was misconfigured (such as a firewall rule or a virtual IP address)
• There may be a software misconfiguration (such as port forwarding for a web server may be configured correctly, but the web server itself may be misconfigured)
• The issue may be beyond your control (such as, your ISP blocking a port)

As an initial step, you may want to try to access the resource locally (keeping in mind that if we are remapping the port from one port number to another, use the port number of the port on the local node hosting the resource). Use the local IP address of the node, even if you have NAT reflection enabled...