diff --git a/Makefile.am b/Makefile.am
index 5d84f1e8..706069fb 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -6,7 +6,7 @@ endif
 
 ACLOCAL_AMFLAGS = -I m4
 man_MANS = man/shadowsocks-libev.8 man/ss-server.1 man/ss-local.1 man/ss-redir.1\
-	   man/ss-manager.1 man/ss-tunnel.1
+	   man/ss-manager.1 man/ss-tunnel.1 man/ss-nat.1
 
 pkgconfiglibdir = $(libdir)/pkgconfig
 pkgconfiglib_DATA = shadowsocks-libev.pc
diff --git a/Makefile.in b/Makefile.in
index c6481071..c75622e0 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -363,7 +363,7 @@ top_srcdir = @top_srcdir@
 @USE_SYSTEM_SHARED_LIB_TRUE@SUBDIRS = libcork libipset src
 ACLOCAL_AMFLAGS = -I m4
 man_MANS = man/shadowsocks-libev.8 man/ss-server.1 man/ss-local.1 man/ss-redir.1\
-	   man/ss-manager.1 man/ss-tunnel.1
+	   man/ss-manager.1 man/ss-tunnel.1 man/ss-nat.1
 
 pkgconfiglibdir = $(libdir)/pkgconfig
 pkgconfiglib_DATA = shadowsocks-libev.pc
diff --git a/man/ss-nat.1 b/man/ss-nat.1
new file mode 100644
index 00000000..3b6b2bbe
--- /dev/null
+++ b/man/ss-nat.1
@@ -0,0 +1,123 @@
+.ig
+. manual page for shadowsocks-libev
+.
+. Copyright (c) 2012-2016, by: Max Lv
+. All rights reserved.
+.
+. Permission is granted to copy, distribute and/or modify this document
+. under the terms of the GNU Free Documentation License, Version 1.1 or
+. any later version published by the Free Software Foundation;
+. with no Front-Cover Texts, no Back-Cover Texts, and with the following
+. Invariant Sections (and any sub-sections therein):
+.   all .ig sections, including this one
+.   STUPID TRICKS Sampler
+.   AUTHOR
+.
+. A copy of the Free Documentation License is included in the section
+. entitled "GNU Free Documentation License".
+.
+..
+\#                          - these two are for chuckles, makes great grammar
+.ds Lo  \fBss-local\fR
+.ds Re  \fBss-redir\fR
+.ds Se  \fBss-server\fR
+.ds Tu  \fBss-tunnel\fR
+.ds Ma  \fBss-manager\fR
+.ds Na  \fBss-nat\fR
+.ds Me  \fBShadowsocks-libev\fR
+.
+.TH "SS-NAT" "1" "May 26, 2016" "SHADOWSOCKS-LIBEV"
+.SH NAME
+ss-nat \- helper script to setup NAT rules for transparent proxy
+
+.SH SYNOPSIS
+\*(Na
+    [\fB\-ouUfh\fR]
+    [\fB\-s\fR \fIserver_ip\fR]     [\fB\-S\fR \fIserver_ip\fR]      [\fB\-l\fR \fIlocal_port\fR]
+    [\fB\-L\fR \fIlocal_port\fR]    [\fB\-i\fR \fIip_list_file\fR]   [\fB\-a\fR \fIlan_ips\fR]
+    [\fB\-b\fR \fIwan_ips\fR]       [\fB\-w\fR \fIwan_ips\fR]        [\fB\-e\fR \fIextra_options\fR]
+
+.SH DESCRIPTION
+\*(Me is a lightweight and secure socks5 proxy. It is a port of the original
+shadowsocks created by clowwindy. \*(Me is written in pure C and takes advantage
+of \fBlibev\fP to achieve both high performance and low resource consumption.
+.PP
+\*(Na(1) sets up NAT rules for \*(Re(1) to provide traffic redirection. It
+requires netfilter's NAT module and \fBiptables\fR(8). For more information,
+check out \fBshadowsocks-libev\fR(8) and the following \fBEXAMPLE\fR section.
+
+.SH OPTIONS
+.TP
+.B \-s \fIserver_ip\fP
+IP address of shadowsocks remote server
+.TP
+.B \-l \fIlocal_port\fP
+Port number of shadowsocks local server
+.TP
+.B \-S \fIserver_ip\fP
+IP address of shadowsocks remote UDP server
+.TP
+.B \-L \fIlocal_port\fP
+Port number of shadowsocks local UDP server
+.TP
+.B \-i \fIip_list_file\fP
+a file content is bypassed ip list
+.TP
+.B \-a \fIlan_ips\fP
+LAN IP of access control, need a prefix to define access control mode
+.TP
+.B \-b \fIwan_ips\fP
+WAN IP of will be bypassed
+.TP
+.B \-w \fIwan_ips\fP
+WAN IP of will be forwarded
+.TP
+.B \-e \fIextra_options\fP
+Extra options for iptables
+.TP
+.B \-o
+Apply the rules to the OUTPUT chain
+.TP
+.B \-u
+Enable udprelay mode, TPROXY is required
+.TP
+.B \-U
+Enable udprelay mode, using different IP and ports for TCP and UDP
+.TP
+.B \-f
+Flush the rules
+.TP
+.B \-h
+Show this help message and exit
+.TP
+
+.SH EXAMPLE
+\*(Na requires \fBiptables\fR(8). Here is an example:
+
+.nf
+    # Enable NAT rules for shadowsocks,
+    # with both TCP and UDP redirection enabled,
+    # and applied for both PREROUTING and OUTPUT chains
+    root@Wrt:~# ss-nat -s 192.168.1.100 -l 1080 -u -o
+    
+    # Disable and flush all NAT rules for shadowsocks
+    root@Wrt:~# ss-nat -f
+.fi
+
+.SH SEE ALSO
+.BR \*(Lo (1),
+.BR \*(Se (1),
+.BR \*(Tu (1),
+.BR \*(Ma (1),
+.BR shadowsocks-libev (8),
+.BR iptables (8),
+/etc/shadowsocks-libev/config.json
+.br
+.SH AUTHOR
+shadowsocks was created by clowwindy <clowwindy42@gmail.com> and
+shadowsocks-libev was maintained by Max Lv <max.c.lv@gmail.com> and Linus Yang
+<laokongzi@gmail.com>.
+.PP
+This manual page was written by Max Lv <max.c.lv@gmail.com>.
+.PP
+The manual pages were rearranged by hosiet <073plan@gmail.com>.