Opened Port But Still Closed

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Opened

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

Check Port Opened

I'm trying to open port 22 on my local machine (Windows 7 32 bit). I'm using a web tool to check if my port is open. It says that port 22 is closed. So I disabled firewall to see if it causes port to be blocked. Even with firewall disabled port 22 is still closed. I'm connecting straight to my cable without a wireless router. What could be the. The open port test in uTorrent doesn't work properly (they are working on it I believe) so you don't need to worry about it. If you have the green check in the bottom right hand side of the uTorrent window, you should be fine.

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.

We initially have opened those specific ports on both ASA and Palo and ports 59112, 59111 and 59110 worked but not port 11171. We then opened the firewalls to all ports to see if it would make a difference but still getting 'port closed'/ 'connection refused' on port 11171 when we test it using different 'Check Open Port' tools. If you are behind a ISP’s modem/router and have not configured any of your ports to be open to the outside then this would be the correct configuration. Although you can get out through your firewall and the response data back because it is a requ.

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

Opened Ports But Still Closed

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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Why Are All Ports Closed

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