diff --git a/docs/nat_traversal.md b/docs/nat_traversal.md
new file mode 100644
index 00000000..dd48fcfc
--- /dev/null
+++ b/docs/nat_traversal.md
@@ -0,0 +1,23 @@
+# 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.
diff --git a/sample-lnd.conf b/sample-lnd.conf
index 21122fe6..8d3e9262 100644
--- a/sample-lnd.conf
+++ b/sample-lnd.conf
@@ -77,6 +77,18 @@
 ; (with host:port notation), the default port (9735) will be added to the
 ; address.
 ; externalip=
+;
+; Instead of explicitly stating your external IP address, you can also enable
+; UPnP or NAT-PMP support on the daemon. Both techniques will be tried and
+; require proper hardware support. In order to detect this hardware support,
+; `lnd` uses a dependency that retrieves the router's gateway address by using
+; different built-in binaries in each platform. Therefore, it is possible that
+; we are unable to detect the hardware and `lnd` will exit with an error
+; indicating this. This option will automatically retrieve your external IP
+; address, even after it has changed in the case of dynamic IPs, and advertise
+; it to the network using the ports the daemon is listening on. This does not
+; support devices behind multiple NATs.
+; nat=true
 
 
 ; Debug logging level.