One-to-one NAT: translate between a public IP address and a specific private IP address

Note: There is only be configured by CLI. No web configuration provided.

Environment Example:
- ISP provide you a public (or global) pool, e.g. 61. 210.39.1 to 61.210.39.4
- Your private IP address is ranged as 192.168.1.0/255.255.255.0

Procedure:
- After the basic configuration, there will be one 'external' interface and one 'internal' interface. You can check by "security list interfaces" CLI command. Assume the 'external' interface named as 'ipwan'
- Adding the global IP pool into 'external' interface as "nat add globalpool gp1 ipwan internal 61.210.39.1 endaddress 61.210.39.4"
- Adding one-to-one mapping for redirect PING packet as example "nat add resvmap rm1 globalip ipwan 61.210.39.2 192.168.1.100 icmp"
- You can change 'icmp' above to all for mapping all protocols
- Delete mapping by using "nat delete resvmap" CLI command.