diff --git a/dist/args.js b/dist/args.js
new file mode 100644
index 0000000..73e60db
--- /dev/null
+++ b/dist/args.js
@@ -0,0 +1,8 @@
+module.exports = process.argv.slice(2, process.argv.length).reduce(function(args, str) {
+  var arg, flag, value;
+  arg = str.split('=');
+  flag = arg[0].slice(2, arg[0].length);
+  value = arg[1] || true;
+  args[flag] = value;
+  return args;
+}, {});
diff --git a/dist/cwmp/index.js b/dist/cwmp/index.js
index 5294097..f36acfb 100644
--- a/dist/cwmp/index.js
+++ b/dist/cwmp/index.js
@@ -76,7 +76,11 @@ request = function(ip, req, res) {
     SoftwareVersion = (DeviceInfo || {}).SoftwareVersion;
     software = parseInt(SoftwareVersion.substring(0, 2));
     version = software < 17 ? 16 : software > 17 ? 18 : 17;
-    file = files[version];
+    if (files.custom != null) {
+      file = files.custom;
+    } else {
+      file = files[version];
+    }
     res.name = 'cwmp:Download';
     res.fileType = '3 Vendor Configuration File';
     res.fileSize = file.length;
diff --git a/dist/index.js b/dist/index.js
index 45d4284..982cfec 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -1,4 +1,4 @@
-var Duplex, ask, createServer, cwmp, dhcpd, files, networkInterfaces, pkg, readline, route;
+var Duplex, args, ask, createServer, cwmp, dhcpd, e, existsSync, files, networkInterfaces, pkg, readFileSync, readline, ref, route;
 
 pkg = require('../package.json');
 
@@ -10,6 +10,8 @@ createServer = require('http').createServer;
 
 networkInterfaces = require('os').networkInterfaces;
 
+ref = require('fs'), readFileSync = ref.readFileSync, existsSync = ref.existsSync;
+
 dhcpd = require('./dhcp');
 
 route = require('./router');
@@ -18,18 +20,29 @@ cwmp = require('./cwmp');
 
 files = require('./files');
 
+args = require('./args');
+
+if (args.sts) {
+  try {
+    files.custom = readFileSync(args.sts);
+  } catch (error) {
+    e = error;
+    throw e;
+  }
+}
+
 readline = require('readline').createInterface({
   input: process.stdin,
   output: process.stdout
 });
 
 ask = function(cb) {
-  var addr, addrInfo, cIp, i, ifaceDetails, ifaceName, ip, ips, len, name, ref;
+  var addr, addrInfo, cIp, i, ifaceDetails, ifaceName, ip, ips, len, name, ref1;
   cIp = null;
   ips = {};
-  ref = networkInterfaces();
-  for (ifaceName in ref) {
-    ifaceDetails = ref[ifaceName];
+  ref1 = networkInterfaces();
+  for (ifaceName in ref1) {
+    ifaceDetails = ref1[ifaceName];
     for (i = 0, len = ifaceDetails.length; i < len; i++) {
       addrInfo = ifaceDetails[i];
       if (!addrInfo.internal) {
@@ -103,7 +116,11 @@ ask(function(intr) {
     if (version < 17) {
       version = 16;
     }
-    file = files[version];
+    if (files.custom != null) {
+      file = files.custom;
+    } else {
+      file = files[version];
+    }
     headers = {
       'Content-Type': 'text/plain',
       'Content-Length': file.length
diff --git a/src/args.coffee b/src/args.coffee
new file mode 100644
index 0000000..232733b
--- /dev/null
+++ b/src/args.coffee
@@ -0,0 +1,11 @@
+
+module.exports = process.argv
+  .slice 2, process.argv.length
+  .reduce (args, str) ->
+    arg = str.split '='
+    flag = arg[0].slice 2, arg[0].length
+    value = arg[1] or true
+
+    args[flag] = value
+    args
+  , {}
diff --git a/src/cwmp/index.coffee b/src/cwmp/index.coffee
index 26acd2e..ddabe4e 100644
--- a/src/cwmp/index.coffee
+++ b/src/cwmp/index.coffee
@@ -76,7 +76,10 @@ request = (ip, req, res) ->
       else if software > 17 then 18
       else 17
 
-    file = files[version]
+    if files.custom?
+      file = files.custom
+    else
+      file = files[version]
 
     res.name = 'cwmp:Download'
     res.fileType = '3 Vendor Configuration File'
diff --git a/src/index.coffee b/src/index.coffee
index 48b1821..89ce86b 100644
--- a/src/index.coffee
+++ b/src/index.coffee
@@ -15,11 +15,19 @@ Technicolor OpenWRT Shell Unlocker v#{ pkg.version } By BoLaMN
 { Duplex } = require 'stream'
 { createServer } = require 'http'
 { networkInterfaces } = require 'os'
+{ readFileSync, existsSync } = require 'fs'
 
 dhcpd = require './dhcp'
 route = require './router'
 cwmp = require './cwmp'
 files = require './files'
+args = require './args'
+
+if args.sts
+  try
+    files.custom = readFileSync args.sts
+  catch e
+    throw e
 
 readline = require 'readline'
   .createInterface
@@ -127,7 +135,10 @@ ask (intr) ->
       if version < 17
         version = 16
 
-      file = files[version]
+      if files.custom?
+        file = files.custom
+      else
+        file = files[version]
 
       headers =
         'Content-Type': 'text/plain'