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<form class="row" id="mainForm" action="/check-it" method="post">
  <div class="large-7 columns left-column">
    <div class="row">
      <div class="small-7 columns">
        <label>Your IP Address</label>
        <input type="text" name="target_ip" id="targetIP" value="217.114.218.20" data-ip="217.114.218.20">
      </div>
      <div class="small-5 columns options-div">
        <a class="button small secondary" id="useCurrentIPButton">Use Current IP</a>
      </div>
    </div>
    <div class="input-options">
      <div class="row">
        <div class="small-7 columns">
          <label>Port Number</label>
          <input type="text" name="port" id="portNumber" value="80" required="">
        </div>
        <div class="small-5 columns options-div">
          <select name="selectPort" id="selectPort">
            <option value="21">FTP - 21</option>
            <option value="22">SSH - 22</option>
            <option value="25">SMTP - 25</option>
            <option value="53">DNS - 53</option>
            <option value="80">HTTP - 80</option>
            <option value="110">POP3 - 110</option>
            <option value="143">IMAP - 143</option>
            <option value="194">IRC - 194</option>
            <option value="443">HTTPS - 443</option>
            <option value="445">SMTPS - 445</option>
            <option value="873">RSYNC - 873</option>
            <option value="3306">MySQL - 3306</option>
            <option value="3389">Remote Desktop - 3389</option>
            <option value="5631">PC Anywhere - 5631</option>
            <option value="5900">VNC - 5900</option>
            <option value="6379">Redis - 6379</option>
            <option value="11211">Memcached - 11211</option>
            <option value="25565">Minecraft - 25565</option>
          </select>
        </div>
      </div>
    </div>
    <div class="btn-wrapper">
      <input type="hidden" name="_csrf" value="uKnZCHejnPZYoDBrhqSUVINiWuSmJT7KBSHheoPGkbc">
      <button type="submit" class="button">Check</button>
    </div>
  </div>
  <div class="large-5 columns ads-wrapper">
    <div class="ads ads-top-right">
    </div>
  </div>
</form>

Text Content

   
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 * Free DNS
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 * Email Checker
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 * Show My IP
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 * Port Scanner


PORT CHECKER

Check for open ports and verify port forwarding setup on your router.

Your IP Address
Use Current IP
Port Number
FTP - 21 SSH - 22 SMTP - 25 DNS - 53 HTTP - 80 POP3 - 110 IMAP - 143 IRC - 194
HTTPS - 443 SMTPS - 445 RSYNC - 873 MySQL - 3306 Remote Desktop - 3389 PC
Anywhere - 5631 VNC - 5900 Redis - 6379 Memcached - 11211 Minecraft - 25565
Check



WHAT IS PORT CHECKER ?

Port Checker is a simple and free online tool for checking open ports on your
computer/device, often useful in testing port forwarding settings on a router.
For instance, if you're facing connection issues with a program (email, IM
client etc) then it may be possible that the port required by the application is
getting blocked by your router's firewall or your ISP. In such cases, this tool
might help you in diagnosing any problem with firewall setup. You could also
find this useful for security purpose, in case you're not sure whether a
particular port is open or closed. If you host and play games like Minecraft,
use this checker to make sure the server port(25565) is configured properly for
port forwarding, then only your friends will be able to connect to your server.


MOST COMMONLY USED PORTS

Port numbers ranges from 1 to 65535, out of which well known ports are
pre-defined as convention by IANA.

 * 0-1023 - Well known ports (HTTP, SMTP, DHCP, FTP etc)
 * 1024-49151 - Reserved Ports
 * 49152-65535 - Dynamic/Private Ports




WELL KNOWN PORTS

 * 20 & 21 - FTP (File Transfer Protocol)
 * 22 - SSH (Secure Shell)
 * 23 - Telnet, a Remote Login Service
 * 25 - SMTP (Simple Mail Transfer Protocol)
 * 53 - DNS (Domain Name System)
 * 80 - HTTP (Hypertext Transfer Protocol)
 * 110 - POP3 (Post Office Protocol 3)
 * 115 - SFTP (Secure File Transfer Protocol)
 * 123 - NTP (Network Time Protocol)
 * 143 - IMAP (Internet Message Access Protocol)
 * 161 - SNMP (Simple Network Management Protocol
 * 194 - IRC (Internet Relay Chat)
 * 443 - SSL / HTTPS (Hypertext Transfer Protocol Secure)
 * 445 - SMB
 * 465 - SMTPS (Simple Mail Transfer Protocol over SSL)
 * 554 - RTSP (Real Time Stream Control Protocol)
 * 873 - RSYNC (RSYNC File Transfer Services)
 * 993 - IMAPS (Internet Message Access Protocol over SSL)
 * 995 - POP3S (Post Office Protocol 3 over SSL)
 * 3389 - RDP (Remote Desktop Protocol)
 * 5631 - PC Anywhere
 * 3306 - MySQL
 * 5432 - PostgreSQL
 * 5900 - VNC
 * 6379 - Redis
 * 11211 - Memcached
 * 25565- Minecraft

If you're looking for a full list of port numbers check out this wikipedia page.
I've listed all the common ports above, feel free to enter any custom port
number to check. By default, this site is taking your device's IP address as
target ip address (the device through which you're visiting this web page), but
you can change the IP input field to check for other IP addresses - remote
clients and servers as well. But, please don't misuse this option otherwise, I
would have to restrict the IP address to source again (as I had done earlier).
Please keep in mind that if you're using a VPN or proxy server then it may not
be able to get your device's IP correctly.


UNDERSTANDING PORT FORWARDING

Port forwarding or port mapping involves translating the address (or port number
to a new destination), accepting the packets and forwarding it (using routing
table). It's typically used in connecting remote computers to specific programs
running on computer (in a private LAN (Local Area Network)). For example :
running a public server (HTTP, port 80) on a computer in a private LAN or
granting SSH access to a specific computer in a private LAN etc. Read More on
Wikipedia.

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