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# Add or Edit Port Mapping

The **Add or Edit Port Mapping** view allows you to add or change [port](/glossary/p/port) mapping settings.

##

^ Item ^ Comment ^
| Rule Name | Rule name. |
| Source Zone | Incoming [zone](/glossary/f/firewall_zone). |
| Destination Zone | Destination [zone](/glossary/f/firewall_zone). |
| Source IP Address | Source [IP address](/glossary/i/ip_address) (for filtering). |
| Dst. Device | Client [hostname](/glossary/h/hostname). |
| Dst. IP Address | Client [IP](/glossary/i/ip) address. |
| Protocol | Mapping [protocol](/glossary/p/port) ([UDP](/glossary/u/udp) / [TCP](/glossary/t/tcp) / TCP + UDP ). |
| Public port(s) | Public (external) [port](/glossary/p/port). |
| Private port(s) | Private (client) [port](/glossary/p/port). |
| NAT Loopback | Enable [NAT Loopback](/glossary/n/nat_loopback) |


### Protocol

The protocol setting filters traffic by protocol for the port forward.

^ Protocol ^ Description ^
| TCP + UDP | Both [TCP](/glossary/t/tcp) and [UDP](/glossary/u/udp). |
| TCP | [TCP](/glossary/t/tcp) only. |
| UDP | [UDP](/glossary/u/udp) only.  |