diff --git a/src/methods/deny.js b/src/methods/deny.js
new file mode 100644
index 0000000..261f27e
--- /dev/null
+++ b/src/methods/deny.js
@@ -0,0 +1,77 @@
+const {exec} = require("child_process");
+const {promisify} = require("util");
+const promisifiedExec = promisify(exec);
+const util = require("../Util");
+
+module.exports.port = async function (port, protocol) {
+  try {
+    if (!port) throw new Error("Missing port input.");
+    if (typeof port !== "number") throw new Error("The port must be type of number.");
+
+    // check port range
+    let checkPort = util.checkAppropriatePort(port);
+    if (!checkPort) return false;
+
+    if (protocol) {
+      if (typeof protocol !== "string") throw new Error("The protocol must be type of string.");
+      if (protocol !== "tcp" || protocol !== "udp") throw new Error('The protocol must be either "tcp" or "udp"');
+    };
+
+    let res = await promisifiedExec(`echo "y" | sudo ufw deny ${port} ${protocol || ""}`);
+    if (res.stderr) throw new Error(res.stderr);
+
+    if (res.stdout) {
+      // will find a better way to parse this
+      if (res.stdout.toLowerCase().match(/(added)/gi)) {
+        return true;
+      } else {
+        console.log(res.stdout);
+        return false;
+      };
+    } else {
+      console.log(res.stdout);
+      return false;
+    };
+  } catch (err) {
+    throw new Error(err);
+  };
+};
+
+module.exports.address = async function (address, port, protocol) {
+  try {
+    // address validation
+    if (!address) throw new Error("Missing address input.");
+    if (typeof address !== "string") throw new Error("The address must be type of string.");
+    let checkAddress = util.checkAppropriateIP(address);
+    if (!checkAddress) return false;
+
+    // port validation
+    if (typeof port !== "number") throw new Error("The port must be type of number.");
+    let checkPort = util.checkAppropriatePort(port);
+    if (!checkPort) return false;
+
+    // protocol (tcp/udp) validation
+    if (protocol) {
+      if (typeof protocol !== "string") throw new Error("The protocol must be type of string.");
+      if (protocol !== "tcp" || protocol !== "udp") throw new Error('The protocol must be either "tcp" or "udp"');
+    };
+
+    let res = await promisifiedExec(`echo "y" | sudo ufw deny from ${address} ${port ? `to any port ${port}` : ""} ${protocol ? `proto ${protocol}` : ""}`);
+    if (res.stderr) throw new Error(res.stderr);
+
+    if (res.stdout) {
+      // will find a better way to parse this
+      if (res.stdout.toLowerCase().match(/(added)/gi)) {
+        return true;
+      } else {
+        console.log(res.stdout);
+        return false;
+      };
+    } else {
+      console.log(res.stdout);
+      return false;
+    };
+  } catch (err) {
+    throw new Error(err);
+  };
+};
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