Port mapping with UPnP and NAT-PMP
npm install @silentbot1/nat-apish
npm install @silentbot1/nat-api
`
Usage
`js
const NatAPI = require('nat-api')
// For NAT-PMP + NAT-UPNP, use:
const client = new NatAPI({ enablePMP: true, enableUPNP: true })
// Note: upnpPermanentFallback is disabled by default, meaning leases on routers which only support UPnP permanent leases will fail, this includes RouterOS/Mikrotik, Netgear, and other ISP provided routers.
// Map public port 1000 to private port 1000 with UDP and TCP
client.map(1000).then(() => {
console.log('Port mapped!')
}).catch((err) => {
return console.log('Error', err)
})
// Map public port 2000 to private port 3000 with UDP and TCP
client.map(2000, 3000).then(() => {
console.log('Port mapped!')
}).catch((err) => {
return console.log('Error', err)
})
// Map public port 4000 to private port 5000 with only UDP
client.map({ publicPort: 4000, privatePort: 5000, ttl: 1800, protocol: 'UDP' }).then(() => {
console.log('Port mapped!')
}).catch((err) =>{
return console.log('Error', err)
})
// Unmap port public and private port 1000 with UDP and TCP
client.unmap(1000).then(() => {
console.log('Port unmapped!')
}).catch((err) => {
return console.log('Error', err)
})
// Get external IP
client.externalIp().then((ip) => {
console.log('External IP:', ip)
}).catch((err) => {
return console.log('Error', err)
})
// Destroy object
client.destroy().then(() => {
console.log('Client has been destroyed!')
}).catch((err) => {
return console.log('Error', err)
})
`
API
$3
Create a new nat-api instance.
If opts is specified, then the default options (shown below) will be overridden.
`js
{
ttl: 1200, // Time to live of each port mapping in seconds (default: 1200)
autoUpdate: true, // Refresh all the port mapping to keep them from expiring (default: true)
gateway: '192.168.1.1', // Default gateway (default: null)
enablePMP: false, // Enable PMP (default: true)
enableUPNP: false, // Enable UPNP (default: true)
upnpPermanentFallback: false // Enable UPNP permanent leases fallback (default: false)
}
`
If gateway is not set, then nat-api will get the default gateway based on the current network interface.
$3
* port: Public and private ports
This method will use port for mapping the public port to the same private port.
It uses the default TTL and creates a map for UDP and TCP.
$3
* publicPort: Public port
* privatePort: Private port
This is another quick way of mapping publciPort to privatePort for both UDP and TCP.
$3
* opts:
- publicPort: Public port
- privatePort: Private port
- protocol: Port protocol (UDP, TCP or null for both)
- ttl: Overwrite the default TTL in seconds.
- description: Description of the port mapping
$3
Unmap any port that has the public port or private port equal to port.
$3
Unmap any port that has the public port or private port equal to publicPort and privatePort, respectively.
$3
Unmap any port that contains the parameters provided in opts.
$3
Get the external IP address.
$3
Destroy the client. Unmaps all the ports open with nat-api` and cleans up large data structure resources.