GUACAMOLE-1252: Merge documentation for configuring RADIUS NAS IP.
diff --git a/src/radius-auth.md b/src/radius-auth.md
index da48d60..33a83dd 100644
--- a/src/radius-auth.md
+++ b/src/radius-auth.md
@@ -183,6 +183,13 @@
parameter has no effect and will be ignored. Valid options for this are any of
the values for `radius-auth-protocol`, except for eap-ttls.
+`radius-nas-ip`
+: This property allows the server administrator to manually set an IP address
+ that will be sent to the RADIUS server to identify this RADIUS client, known
+ as the "Network Access Server" (NAS) IP address. When this property is not
+ specified, the RADIUS extension attempts to automatically determine the IP
+ address of the system on which Guacamole is running and uses that value.
+
(completing-radius-install)=
Completing the installation
