diff --git a/submissions/serphiy/port-sniffer/sniffer.js b/submissions/serphiy/port-sniffer/sniffer.js
new file mode 100644
index 0000000..d6cb3de
--- /dev/null
+++ b/submissions/serphiy/port-sniffer/sniffer.js
@@ -0,0 +1,97 @@
+'use strict';
+
+const net = require('net');
+
+function parseArgs () {
+  const args = process.argv.slice(2);
+  const parsed = {};
+  let key = null;
+  args.forEach(arg => {
+    if (/^--/i.test(arg)) {
+      key = arg.slice(2);
+      parsed[key] = true;
+    } else if (key) {
+      parsed[key] = arg;
+      key = null;
+    }
+  });
+  return parsed;
+}
+
+function validateParams (params = {}) {
+  if (params.help) {
+    console.log(`Sniffer allows easily search for opened TCP ports on particular host
+
+Usage: node sniffer.js --host <address> [--ports <start_port>-<end_port>] [--help]
+
+Options:
+    --help    Show this screen
+    --host    Specify domain or ip of the host
+    --ports   Specify range of ports to scan from 0 to 65535 in format lo-hi [default: 0-65535]`);
+    return false;
+  }
+  if (!params.host || typeof params.host !== 'string') {
+    console.log('host is required');
+    return false;
+  }
+  if (params.ports) {
+    if (!/^\d+-\d+$/.test(params.ports)) {
+      console.log('invalid ports format');
+      return false;
+    }
+    const ports = params.ports.split('-').map(port => parseInt(port));
+    if (ports[0] > ports[1] || ports[1] > 65535) {
+      console.log('invalid ports range');
+      return false;
+    }
+  }
+  return true;
+}
+
+function checkPort (host, port) {
+  return new Promise(resolve => {
+    const socket = net.createConnection({ host, port, timeout: 300 });
+    socket.on('connect', () => {
+      process.stdout.write('.');
+      socket.end();
+      resolve(port);
+    });
+    socket.on('timeout', () => {
+      socket.destroy();
+      resolve(null);
+    });
+    socket.on('error', () => {
+      resolve(null);
+    });
+  });
+}
+
+function scanChunk (host, chunk) {
+  return Promise.all(chunk.map(port => checkPort(host, port)));
+}
+
+function scan (host, ports = '0-65535') {
+  const [start, end] = ports.split('-').map(port => parseInt(port));
+  const arr = Array.from({ length: end - start + 1 }, (v, i) => i + start);
+  const chunkSize = 100;
+  let chain = Promise.resolve([]);
+  for (let curr = 0; curr < arr.length; curr += chunkSize) {
+    const chunk = arr.slice(curr, curr + chunkSize);
+    chain = chain.then(prev => scanChunk(host, chunk).then(scanned => prev.concat(scanned)));
+  }
+  chain.then(results => {
+    const opened = results.filter(port => port !== null);
+    if (opened.length) {
+      console.log('\nopened ports:', opened.join(', '));
+    } else {
+      console.log('no opened ports');
+    }
+  }).catch(err => {
+    console.log('ports scan failed', err);
+  });
+}
+
+const params = parseArgs();
+if (validateParams(params)) {
+  scan(params.host, params.ports);
+}