diff --git a/USAGE.txt b/USAGE.txt
index ef009dd9b9..9a628ce199 100644
--- a/USAGE.txt
+++ b/USAGE.txt
@@ -34,8 +34,16 @@ Options:
     --listen=<proto>://[addr][:port]
 
         Listens at addr:port with protocol <proto>. Allowed values for
-        proto: "socks", "http". The default proto is socks. The default
-        addr is 0.0.0.0. The default port is 1080.
+        proto: "socks", "http", "redir". The default proto is socks.
+        The default addr is 0.0.0.0. The default port is 1080.
+
+        For redirecting local traffic from the same machine:
+
+        iptables -t nat -A OUTPUT -p tcp -d ... -j REDIRECT --to-ports 1080
+
+        For redirecting forwarded traffic on a router:
+
+        iptables -t nat -A PREROUTING -p tcp -d ... -j REDIRECT --to-ports 1080
 
     --proxy=<proto>://[<user>:<pass>@]<hostname>[:<port>]