ClearOS Documentation

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1 to 1 NAT

1-to-1 NAT maps a public Internet IP to an IP on your local area network (LAN).

Installation

If you did not select this module to be included during the installation process, you must first install the module.

You can find this feature in the menu system at the following location:

Network|Firewall|1-to-1 NAT

Configuration

You can map 1-to-1 NAT IPs in one of two ways:

  • With no firewall at all
  • With selective ports open

1-to-1 NAT - No Firewall

Some protocols can be finicky behind firewalls. In this case you want to configure 1-to-1 NAT with no firewall (make sure you secure the target LAN system some other way!).

1-to-1 NAT - Selective Ports Open

If you only want to map selective ports, for example the TCP 80 web server port, you can configure particular ports in your 1-to-1 NAT mapping.

1-to-1 NAT - With MultiWAN

If you have Multi-WAN enabled, please review the topic on source-based routes. Each 1-to-1 NAT rule must typically be assigned to an external MultiWAN interface as shown by example below:

content/en_us/5_1_to_1_nat.txt · Last modified: 2015/03/02 08:00 (external edit)

https://clearos.com/dokuwiki2/lib/exe/indexer.php?id=content%3Aen_us%3A5_1_to_1_nat&1563961577