24 lines
1.1 KiB
Markdown
24 lines
1.1 KiB
Markdown
# NAT Traversal
|
|
|
|
`lnd` has support for NAT traversal using a number of different techniques. At
|
|
the time of writing this documentation, UPnP and NAT-PMP are supported. NAT
|
|
traversal can be enabled through `lnd`'s `--nat` flag.
|
|
|
|
```shell
|
|
⛰ lnd ... --nat
|
|
```
|
|
|
|
On startup, `lnd` will try the different techniques until one is found that's
|
|
supported by your hardware. The underlying dependencies used for these
|
|
techniques rely on using system-specific binaries in order to detect your
|
|
gateway device's address. This is needed because we need to be able to reach the
|
|
gateway device to determine if it supports the specific NAT traversal technique
|
|
currently being tried. Because of this, due to uncommon setups, it is possible
|
|
that these binaries are not found in your system. If this is case, `lnd` will
|
|
exit stating such error.
|
|
|
|
As a bonus, `lnd` spawns a background thread that automatically detects IP
|
|
address changes and propagates the new address update to the rest of the
|
|
network. This is especially beneficial for users who were provided dynamic IP
|
|
addresses from their internet service provider.
|