diff --git a/Cargo.lock b/Cargo.lock
index 185da7d..7f86c0a 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -232,9 +232,9 @@ dependencies = [
 
 [[package]]
 name = "rust_util"
-version = "0.6.5"
+version = "0.6.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c152cad8a04f2de2840155adcc473dac011ffbe8ff33f8dfcfab489afa92d134"
+checksum = "47a20a379d025a6f0da1bc84d6284137eea58c493484bf6912144a864f53c3de"
 dependencies = [
  "lazy_static",
  "libc",
diff --git a/src/main.rs b/src/main.rs
index 9aea75c..cc10b82 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -28,11 +28,12 @@ fn main() {
             .help("The address on which to listen for incoming requests"))
         .arg(Arg::with_name("debug").short("d").long("debug").takes_value(true)
             .help("Enable debug mode"))
+        .arg(Arg::with_name("allowed_list").short("A").long("allowed-list").takes_value(true).multiple(true).help("Allowed IP list, e.g. 127.0.0.1, 120.0.0.0/8"))
         .get_matches();
 
     let local_port: i32 = matches.value_of("local_port").unwrap().parse().unwrap();
     let remote_port: i32 = matches.value_of("remote_port").unwrap().parse().unwrap();
-    let remote_host = matches.value_of("h").unwrap();
+    let remote_host = matches.value_of("host").unwrap();
     let bind_addr = match matches.value_of("bind") {
         Some(addr) => addr.to_owned(),
         None => "127.0.0.1".to_owned(),
@@ -65,6 +66,7 @@ fn forward(bind_addr: &str, local_port: i32, remote_host: &str, remote_port: i32
     let mut buf = [0; 64 * 1024];
     loop {
         let (num_bytes, src_addr) = local.recv_from(&mut buf).expect("Didn't receive data");
+        // TODO check src_addr ...
 
         //we create a new thread for each unique client
         let mut remove_existing = false;