PR : adds documentation.
@@ -143,11 +143,15 @@ NSD will bind to the listed ip\-address. Can be given multiple times
to bind multiple ip\-addresses. Optionally, a port number can be given.
If none are given NSD listens to the wildcard interface. Same as commandline option
.BR \-a.
+.IP
To limit which NSD server(s) listen on the given interface, specify one or
more servers separated by whitespace after <ip>[@port]. Ranges can be used as
a shorthand to specify multiple consecutive servers. By default every server
will listen.
-.BR
+.IP
+If an interface name is used instead of ip4 or ip6, the list of IP addresses
+associated with that interface is picked up and used at server start.
+.IP
For servers with multiple IP addresses that can be used to send traffic
to the internet, list them one by one, or the source address of replies
could be wrong. This is because if the udp socket associates a source
